It's the only game that's been installed on my machine over a 6 months and I still play it from time to time. Cosmetic mods (model, textures, hair, eyes, clothes), a few outfits, and some interesting melee weapons and off I go. I do still find it funny how stealth starts off as crap and then suddenly becomes way overpowered. Most challenging, yet rewarding build I've done was my hand to hand expert. She was brutally hard starting out but started to get very powerful in the teens. Might have been a bit easier if I didn't use the x5 mobs mod. lol
Oddly enough, I'm of a similar mindset as Khalus on oblivion as he is with Fallout. I've tried and tried, but just can't get into it.