Cant argue taste i suppose. Medieval genre just doesnt do it for me and a good majority of RPG games are that sort of setting. Good sci-fi RPGs are a minority in my opinion, which undoubtably lead to my love affair with Mass Effect. Or perhaps Bioware in general, as i swooned over Kotor and even Dragon Age Origins.
By all means its your call, but Mass Effect is worth at least researching. If nothing else, transfering choices from game to game is unique.
I'm not against playing it. I just haven't gotten around to it. I've only been gaming again since last October and most of that has been occupied by the combination of Skyrim, Kingdoms of Amalur, and Witcher 2.