There's many I can list, but I suppose the ones that I play on a regular basis would be best for this topic, so....
1) Super Smash Bros. Melee: Always smash parties at college.
2) FFXI: A drug I need rehab for, but too lazy to quit.
3) ESF: While I'm currently taking a break from it, it still counts here.
4) Battle Stadium D.O.N.: Same reason as smash. Gomu Gomu No...HARABI!!!