Beelzeboob and cheese??
Seriously, I enjoy working on them, bringing them back from the dead, modding them, adding personal touches and of coarse playing them.
Ive been working on a Jurassic Park now for 3 months and its almost finished, just need some Cliffy's to finish it off. It took a lot of work but playing it and finally being able to put it next to echo, my full sized raptor will be so rewarding. Even the kids are excited!
After a long day at work, I enjoy the tinkering or modding or playing. Takes my mind off my horrible job and the losers I work with.