Same here. I have a Quicksilver 2002 G4-800 I use everyday, with ZERO problems, not even a single lockup, crash, or kernel panic.
Yet the IBM ThinkPad I bought back on March 4th has had so many problems, i already have to clean it out and redo everything. That is saying alot considering I've only had it for 2 months, yet the Mac has been running since early November without a single hiccup.
Also, I can use just about any program I can find, you just have to look for the Mac version.
Even the schools here have completely and totally switched over to Macs, as they were sick of Windows being so unreliable and vunerable, they were repairing PCs on a weekly basis, yet now that they have switched, not a single Mac has had to been repaired since the switch in early 2006. How do I know all of this? I was in class called CRS (Computer repair specialists), and we were always repairing the PCs, yet when the switch was made, we never got a single Mac in for repair. I left in January of '06, so I don't know anything after that than they are still using the same Macs with zero problems.