Wow there's a LOT going on with everyone here
Apart from coffee, HMM that's a hard one!
I'm currently at uni for 7-8 months at a time and it's pretty intense (at least for me!) so my hobbies get executed in fits and bursts - I guess it's a double edged sword! (and never with any money...)
In no order:
Electronics - currently assembling a coil/Gauss gun and often make Cmoy audio amplifiers for a little extra money.
Apple macs - I saw someone else here with the same affliction. I currently own: Macintosh SE FDHD, Classic, Graphite G3 iMac 500 DVSE+, G4 450 Cube, Power CD, Emate 300, a few eMacs, Dual 1.25 G4 Mirrordoor. All get used at some point for something, I can't get rid of any. Like I say, it's an affliction.
Guitar - played bass for about 5-6 years and 6 string for about 3, it's something you can just pick up and enjoy and put back down again - I wish more things were like this!
Training - I like to lift weights and do a bit of cardio.
Videogaming - Uplink, Fallout 3, Morrowind, Oblivion, Vampire Bloodlines, C+C, Escape Velocity trilogy to name but a few - some say wasted youth. (?!)
I have had 3 VW beetles, '69, '72 and '73 'vintage'. Good, messy fun! Also doing a '65 Rover P5 straight 6 DG auto, what a lovely car
Lego! I got myself some NXT stuff, incredible! Interfacing bricks using Phillips I2C!