I have been running a quad boot Win95, Win2000, WinXP and Ubuntu at home for about a year now, and run XP SP2 at work. I prefer Ubuntu over all of them for my daily tasks, except for AutoCAD. Unfortunately I have yet to come across the rumored upcoming AutoCAD for linux.

There have been issues, but nothing as bad as winblows used to give me every six months or so. Every issue I've had I found a solution for that day. I use Ubuntu almost exclusively at home and have never had any internet-related issues