Maybe i'm wierd, but i like jaggies, and i hate softened out images. I really like how a picture looks without that kind of assistance. One of the reasons i absolutely hate dlp and lcd screens at low resolutions. Dlp and lcd screens really only look good at the highest resolutions their capable of. Anything less starts getting softened out more and more the lower you make the resolution.
The reason i liked crt monitors, was that they didn't soften out the picture at all. I got all my stout pixelated blocky glory at 320x240, because then i knew i got to see the picture for what it really looked like. If i wanted softened out images or no jaggies, then i'd turn on AA.
Jaggies get taken care of pretty well at 1024x768 and up. I just like the look of a game at a high resolution with no AA. Since you can minimize jaggies pretty great at high resolutions, why have AA on to drop performance (some people like AA at 1400x900, my dad sure does)? I'm also a big fan of anistropic filtering with vertical sync on a monitor that can at least do 85hz. Also, dvi and hdmi are way better than vga (vga you can notice some softness on everything to a small degree at high resolutions compared to dvi and hdmi).