You can play all media in totem-gstreamer if you install the gstreamer plugins. You get dvd support by installing libdvdcss2.
While xine is excellent, the I only use totem and such for music (goom), for video I use mplayer. See www.mjmwired.net
for excellent post-install advice and explainations.
There's the classics: frotz and nethack.
Nethack you know - see the "falcons eye" addon (but needs work).
Frotz will play z-machine interactive fiction (including those old DOS *.dat files that come in the infocom floppies.)
Of course, young folk will prefer something like cedega for online gaming. Will play EVE - apparently.
Me - I went and got the "Not So Short Introduction to LaTeX" and installed the suggested extra packages (no yum, need rpm for this) so I could use the full graphics/html ability of pdflatex as well as pdfscreen. I also got octave, good for those who cannot get matlab. When you write for publication, and do a lot of math, these are vital.
Eventually, I installed yumex.
I got the ms fonts from mjmwired, but also a lot of fancy ttf fonts from cumberland games.
That should hold ya.