Re: favorite level
There was a level on Hitman:Blood Money, where you were on a small bright coloured street, and had to assasinate a crime lord and get his wifes necklace whilst they were having a bbq, i loved that level and constantly played it over again, not sure why, i just remember that level and playing it other and other!
As forboss levels? well some of those bosses from resistance 2 were pretty darn impressive and memorable, but i think most of my faves are from dead Space!
And as for a level that is a graphical masterpiece…..I'd go for the original Uncharted, graphics aren't as good as the sequel (well, nearly), but at that time they were perfection, i loved the bit near the start where you find the submarine in the waterfall, and looking down from the cliff edge/waterfalll at that view…..