I do whatever I can on my Passat.
Usually it's basic maintainence, oil breaks, blah blah, oh and having the VW computer Software helps too...I love being able to read and clear CEL/MIL codes w/o having to go to a dealer.
Replaced the timing belt, tensioner, and all other belts after Christmas, I was patting my self on the back for that one for like a week, lol.
It started as just a way for me to save a shitload of money...dealer wants 1100 for the TB replacement, I spent 300 on it and did it my self. Now, it's turned into a hobby, it's actually relaxing doing something that complicated...go figure.