Who is using MPEG and Who is using H.264?

I guess this really applies to 5G iPod owners only, but I welcome everyone to chip in their 2 cents. I am just curious as to who is using the formats and why. I am well into the process of converting my movie files and ripping my DVD's to an iPod friendly format but am always questioning my choice of using the MPEG format over H.264. I would like to know what the split amongst the MR community members was. I'm sure that there are arguments for both sides.

 

My main reason for using MPEG was the time it took and the fact that I could get a higher resolution (for TV output). Putting time aside, even with the lower resolution, is H.264 better on a TV output?
Also, I would imagine that source file makes a difference as well. I have found that when going from an AVI to an iPod file, the H.264 does not look any better than the MPEG. Perhaps, if the source is a DVD then H.264 is more appropriate (once again, not considering the time)