ME1 had the best adventure feel now that i look back at it however the gameplay was such garbage i wanted to finish the game ASAP when i first started so i basically played the game very linearly. I have come to appreciate it now and want to go back and play through in-depth. ME2 had the best story. The gameplay was incredibly improved and much better than the first as well but what [i]really[/i] got me was the entire mystery around everything. It was brilliant. However being able to go to a planet, land, and explore was basically impossible. Everything had a mission and a purpose. Other than that everything was better without a doubt. ME3 had the best gameplay. At first it felt way too cod-like but eventually i or used to it. Everything was fluid and you could do many more things without having to stop and stop and stop, it just felt less clunky. The biggest disappointment was easily the hype revolving around Earth's invasion. It also mixed side-quests with story missions which I hated so much and to add insult to injury the explore feel was abolished. Whatever exploration the ME series had before, it was all killed by ME3. I feel like they traded exploration for multiplayer. I'm not saying it was the wrong choice but i wish we could have both. All in all ME2 was my favorite with ME3 a close-second.