For me BW1 and 2 quickly got very boring. They were fun for a few hours.. Maybe even days, but at that point, the desire to keep playing would fade away. The quests were pretty generic, and quickly got boring. also there was just something suspect about gfx and game play in general. Dont get me wrong, it was all nice, but in places, it felt like the devs didn't finish things.. It could be just me off course.
I second Dungeon Keeper. There is simply no other game like it. I never played DK2, but the 1st one was awesome, especially with the 3d patch. I wonder why is it that no one bothered to make a similar game since then, or at least buy the license and make DK3... I mean.. C'mon! In what other strategy game do you get to posess your units and control them from 1st person view?!