Bioware games are NOT for everyone -- it's just like no matter how popular or critically hailed a game/movie is, there are going to be those who like it and those who don't.
Personally, I find game reviewers' tastes to be more and more completely off from what I want. The problem I think is that game reviewers are all hardcore gamers who've played everything and anything. Sure, they know to call something as cliche or unique, but their views are based on endless playing -- to most of them, ME presents a whole new experience that's all about story and exploration and that's awesome to them because they've played the others.
There are gamers who don't have the time or patience for those types of games, and frankly, I'm one of them.
I bought KOTOR 1 and Jade Empire and hated the latter. The moment I saw ME, I was impressed, but the engine and gameplay design hasn't changed much. It's still heavily driven by NPC interactions and yeah, some people love that. I'm just not one of them.
That said, I get why ME is impressive and amazing. I think even those of us who find it monotnous or ho-hum can appreciate the level of passion put into the game. It's just that not all of us are sci-fi lovers or perhaps Trekies. ME's story is solid, especially for a videogame, but it still pales in comparison to great novels. Bioware sure is getting closer, though.
I know it looks like everyone loves ME, but I don't, and I think it's important to realize where game reviewers are coming from before you just blindly agree with them.
As I've said, I've discovered that more and more what game reviewers complain about in games (short length but may be tight experience, simple control system, linearity, etc.) are not the deal-breakers for ME. They knock points off games for that when I actually may view those things as positives.
7s thus become 8s and 9s for me, and games that get 9s might actually be 7s. Bottomline: Just because people around you seem to love ME doesn't mean you will. And game reviewers shouldn't be the end-all be-all viewpoint, either.