However, I absolutely love Bioware's games like Knights of the Old Republic and Dragon Age (even Dragon Age 2 believe it or not) with their amazing story-lines.
Yes. Sure, the game mechanics vary by game, but the overall story and collection of characters is great (barring the last ten minutes

).
One thing about the trilogy set - stupidly, it doesn't include all the DLC you might want for the full story. (as with most DLC, some are just side quests, but others actually have some story connection. In particular, I'd say that the ME2 DLCs "Lair of the Shadowbroker" and "Arrival" are reasonably important. But you could put off any decision about those until halfway into ME2.)