Doesn’t look like you played 1.
I would suggest you do. I don’t know what platform you’re on, but only the Xbox and the PC have all three games available. PS3 only has 2 and 3.
The whole thing about the Mass Effect series is the fact that major and minor decisions in 1 carry over to 2, which influence 3. So playing through all 3 is the best way to experience that trilogy, IMHO.
The first 1 suffers from some clunky game machanics, but the story and characters are great, and more importantly, it does an incredible job of setting up the universe and introducing you to various factions/people/places.
The second game is by far the best of the three. It excells at giving you a sense of exploration, improves upon game mechanics and character development, and is probably the longer of the three games. Truly satisfying experience.
The third chapter suffers from some pacing issues, has an ending that can be charitably called nonsensical, but offers the best game mechanics yet, and although the ending to the game itself, IMHO, sucks, the endings to the relationships you’ve built through out the trilogy are, for the most part, satisfying and memorable.
Really, given your game preferences, this game should be right up your alley. It’s very much an action RPG with choices that tend to mean a lot for your character, and the story you help create.
The shooting mechanics might turn you off, I don’t know, but you cna always play it on easy, right?
EDIT: I re-read your post, looks like you played through 1. You didn’t happen to keep the save handy, did you? If you’re on PC you can always hit MassEffectSaves.com and download a save with the choices you remember making. But yes, Mass Effect 2 is a MUST. The best game of the trilogy, and once you played that, you kind of have to play 3 and see how it all turns out, no?