Saw this on Slashdot... HardOCP has finished the second part of their '30 Days with' series - the same author spent 30 days using both Linux and Vista.
I'm a bit biased (GO UBUNTU) but it's interesting to read the conclusions for both:
XP is going to be my OS for gaming, audio loop editing, and Photoshop, but for everything else, Linux has transformed into an attractive, utility-driven, customizable, and generally easy-to-use interface that takes all of the virtues and none of the faults from the other major OSes and gives it to the consumer for free.
I really did want to like Vista. Yes, it is possible to enjoy both Windows and Linux - but unfortunately this product is unfit for any user. I still intend to keep a Windows XP partition on my computer for gaming and some multimedia editing, but as of the time of this publication, I have removed Vista entirely.
I haven't had the opportunity to play with Vista yet though I would like to take it for a spin but there is no way I'm shelling out my $$ for it! And speaking with the IT staff here at work it'll be a loooong time before we move to Vista.
So far I'm still very happy with my switch to Ubuntu at home - and would suggest anyone considering moving to Vista to try out one of the many 'Live' Linux CD's...