I actually thought Unreal and Unreal Tournament were far superior especially when you consider they shipped with Unreal Ed which was WAY ahead of its time. Carving out space rather than inserting was genius and avoided the problem of cracks appearing in you're level which messed up the space partitioning algorithm.
lets not forget about Metal Gear Solid and other such achievement's from other segments of the industry that really knocked my socks off.
love them, also love playing late 90's games with high res, e.g. Age Of Empires 2 @ 4k. You hardly ever have to scroll!
dungeon keeper 2 also rocks on widescreen / infinite zoom out. You can almost play it on touch screen (almost, its a bit glitchy).
Full screen emulators today are fun, yes its stretched but in the past it was always 4:3 @ 17". Plus the joystick doesn't stick all the time. You can save via memory snapshot and use any control setup you desire (any game).