Fallout 3 is surprisingly entertaining. It just seems to call you towards its dark mysterious abyss.
The visuals are very high quality yet they don't even stress my comp.
I loved how much detail they put into everything from houses to enemies and NPCs. And the VATS system is very handy for when you are not bothered shooting yourself. I must add that the crosshair isn't that great. I think that they should've used the circular crosshairs like in Crysis Warhead.
On a positive note theres heaps of blood and gore which is shockingly gruesome but fun. There's heaps of side-quests. The environment is very interactive and overall it seems quite real. The use of drugs gives this game a mature and engrossing feel.
I didn't like the 1950's retro theme. It made the game seem quite primitive. And the power armor design scared me. I would have like to see the Halo/Crysis style armor used. Plus the one handed weapon movement didn't look that good. And the movement seemed VERY slow. And there's some nasty bugs.
But despite its flaws Fallout 3 is one heck of a good and and is worth every penny.