I played several years non stop for Morrowind. Oblivion lasted several months but only after installing over 100 quality mods. Fallout 3 lasted me less than a week. Another week after installing a number of mods and I have to say there's not a lot to choose from, probably because when you remove the fantasy element, a lot of quest mods are ruled out.
Now I only play Fallout 3 once in a while, and only because of Real-Time Settlers New Wave mod. There's nothing in vanilla Fallout 3 I found fun. Fallout 3 lacked the epic play one time storyline like Witcher 1&2, yet didn't have decent repeatable quests to make a decent open ended game.
Damn, yeah here..
Just, the game tired me like hell, i usually found my self tired and headache after playing for a while..
Ok i was using some hardcoe mods, and time to time i enjoyed that "hardcoe" situation a lot, like once at the nuka-cola factory, that was the one of the most awesome plays of my life, managing my inverntory, limited ammo.. And foods, alchols, drugs.. scaring with every bit of my step, seeing the world in "orange" due the drugs^^
Yeah but, long story short, it tired and bored me even in vanilla version.. The thing is, it is just too slow and choppy i guess..
In the other hand fallout new vegas and skyrim (specially nw) was JUST A MASTERP?ECE!! Havent seen any better game except, baldurs gate maybe, in my life..