I just switched to HDTV and I am still getting used to HDMI cables and all that shit. I didn't think that my PS2 would look worse on HDTV than my SD, so I had to buy Component cables to switch with my Composite ones, I haven't tried them out yet, but apparently it makes the PS2 look better.
SDTV never really bothered me, but some font in newer games started to become harder to read. You could tell they just weren't making games for SD anymore, so I thought I better upgrade, it was about time too, hehe.