what do you set the video resolution size to?

[lordanubis]

I was encoding a dvd today and I was wondering what other people use for a video size resolution, or the dimensions for their video. When I encode widescreen movies I always use 640 X 272 for one kind of widescreen and 640 X 352 for the other kind of widescreen. And I use 640 X 480 for fullscreen movies. But I find that the Fullscreen movies I do always have a funny look to them. What does everyone else use for widescreen and fullscreen sizes that could look better? Thanks.

[BSR]

720x480 and 352x480 for DVD.
512x384 for xvid. Smaller file than 640x480 but still with good quality.
Never did Xvid of widescreen.