The majority is eye candy, some of the window switching stuff is nice. The real reason to use compiz-fusion is this:
1. Buy a white 9 inch screen eee pc
2. Install eeebuntu with compiz-f
3. Change the terminal to black backround with hot-green text or use an irc client with the same colors
4. Sit in front of hot girls during lectures
5. Use the terminal or irc from time to time and show off while boring professor talks to himself
6. Integrate into hot girls lives seamlessly
Pro tip: Use gdesklets(widgets/gadgets) for more eye candy such as
Starterbar