I'm a veteran Windows user (for which I'm not proud of), with very little Unix experience, wanting to make the switch and leave M$ aside as much as possible.

My main reasons for this are (from worse to... worst):

• Need to format every 6 months because of my registry getting fatter and fatter and my gigs of RAM aren't enough to hold all that junk.
• Impossibility to predict system stability when installing a new third party software. I mean, seriously...