So... let's talk about revisiting the old games, and commence drooling over the third!
Relevant info:
- Playing as Femshep, naturally
- Playing as a Vanguard
- Romancing nobody because Bioware romances are awkward.
- Paragon
- Chose Ashley over Kaiden because he's pathetically heroic and she's a smartass with lots of guns.
Revisiting Mass Effect 1
Technically my third time playing through this one. I'm finding it surprisingly hard to go through it again. Maybe it simply comes from the fact that ME2 had a lot of spit and polish to clean up various aspects of gameplay, and going back to ME1 means everything suddenly feels primitive in comparison. That said, though, there are a lot of things ME1 did right that ME2 dropped, and I prefer various characters in the first game to the squadmates in the sequel. The main story is also much better. Probably because there is one.
Combat System
It's less refined, of course, but it does the job well enough. You're actually on the overpowered side in the first game. A maxed-out shotgun can kill almost any baddie in one hit. Very jarring when you try that in ME2, because you make the horrific realization that one-shot kills don't necessarily work anymore and now you're staring uncomfortably down the barrel of an enemy assault rifle. Biotics went through the opposite evolution - weak/simplistic in the first game, powerful and versatile in the second. So I guess it balances it out?
I think I preferred using medigel and armor mods to heal myself, though. Rather than the Gears of War-style health recharge in the second one. Which always feels like a way of of pussying things up for the people who don't approach battle sensibly. But that's a complaint about that gaming mechanic in general, not specifically its use in ME2.
Leveling/Inventory
I actually preferred ME1's leveling system, I think. More versatility. And you didn't have to put any skill points into using special ammunition like you did in ME2. Ammunition is a thing, not a skill. You slap it into the gun and shoot. So it was nice to have a divide between customizing weapons and leveling up actual skills - something I hear they brought back for the third game. As for the inventory system, yeah, it's obnoxious. But somewhat manageable if you keep only the essentials and clear out the junk as you go.
Exploration/Design
Looooot of big empty rooms in ME1. Lots of needless running around. Exploration planets are almost entirely barren save for a few stock mines/bases. Blatant "crates suspiciously sitting around totally not for gunfire cover" syndrome going on. I never had a problem with the Mako like some people did, but I can see why they cut out planetary exploration in the second game. Nothing down there. ME2 went a little too far in the other direction, though, with every visitation to another world feeling pre-scripted rather than exploratory.
Story
ME2 actually left a very sour taste in my mouth after the first playthrough, simply because it felt like NOTHING HAD HAPPENED other than Shepard playing counselor to a bunch of effed up squadmates. There's basically two or three big missions that have anything to do with the whole Reapers-invading-and-slaughtering-everything plot. The other 80% of the game is glorified sidequest. So ME1 shines in the story department. It's on the cliche side, but it has some great moments. Especially near the end. It properly felt like you were trying to save the galaxy from an imminent threat.
Characters
I desperately missed the original crew when I first picked up ME2 - so the first game did something right! They aren't bogged down in their own melodramatic problems. Some may have early versions of "loyalty quests," but they're optional bonuses. They are your brothers-in-arms and they will lay down their lives for you. You get the sense that they want to be there, as opposed to ME2, where half of them are on the team against their will until you win them over.
Unfortunately, for as nice as the characters are, they don't get the same attention devoted to them as the sequel's cast. Simply because of how the story is set up, I suppose. You get glimpses into their pasts and why they feel the way they do. Ashley's not a gun-toting space racist, she's just traumatized by her shameful family legacy and will happily learn to get over her issues if you talk her down. Wrex is not a typical krogan mercenary, he's the self-exiled son of a clan leader and would like to actually help his people, but is so fed up with their closed-mindedness that he can't bring himself to do so (yet). That sort of thing. But for the most part, they're on the flatter side of the characterization spectrum when compared to the other cast. They do well at showing off what they can, though.
There's a bonus in going back to this game and seeing characters like Garrus and Tali. You definitely get the sense that they bonded throughout the story. They're very close to you in ME2, but at the start of ME1, there's a strong "I just met you" vibe going on. They're friendly, yet distant and/or shy. It gradually fades and morphs into the relationships you see in the second game, even ignoring the problems below.
Dialogue
Annnnnnd here's where ME1 falls flat. This picture demonstrates the two extremes between Bioware's dialogue:

The dialogue and interactions in ME2 absolutely trumps the first game. Dialogue in ME1 feels stilted, matter-of-fact, and detached. It lacks life. Your teammates don't typically interact with each other unless they're in one of those damn elevators. Otherwise, if you bring specific squadmates to a mission, they just say variations of the same exact lines. The dynamic doesn't change up. There are only a few characters that make attempts to banter with you or be a well-adjustd smartass (Garrus and Ashley being leading examples). Otherwise, barring certain events, things feel distant. And Shepard's dialogue options aren't that great at all. You're extreme Paragon, extreme Renegade, or extreme Apathetic.
ME2? Everyone's cracking jokes, interacting with each other, and everything feels comfortable. There's a lot more friendly banter. Even amongst strangers who don't really want to be there. There are various members of the cast who outright hate each other and will fight. If you bring certain people to missions, the team dynamic feels like it changes and you get more unique lines.
ME1? Almost everyone feels like they have something shoved up their ass in comparison. And in a game like this, dialogue and team interaction is incredibly important.
Well, according to Joker, Garrus did. But then he learned to remove it and beat people to death with it.