Recordable Media +/- Which one??

Here's the deal. I need some info regarding burning cdrs/dvds (both rw and r). Which format (plus/minus) is most compatible with most players.

I know that if the recipient has a computer it doesn't really matter (does it? ) I'm more interested regarding my friends who don't have a pc and would view pics or video on their dvd players.

Not that it matters, but I use a 24"(aluminum) iMac and a Panasonic HDD DVD recorder.