Let's keep bedroom antics out of this thread.
Interesting that many of you liked ME1 the best. It's the only one I haven't played. I loved ME2 and ME3 though. I don't think they're that overrated because I do think they are some of the best games to be released this generation. The characters are great, the story is good, the space exploration is hella fun, and while the combat is not groundbreaking it is at least entertaining (if you choose the right class).