I just switched... So I can't really say anything..
I'm enjoying Linux so far (MDK 9.2) and don't plan on going back to windows for much of anything..
My windows box hosts a website I created for my family to track expenses on our investments (Lake House, Time Share Property, Et.Al) and sweat equity within each different project.
So - if I must say the only thing I would use windows for is:
Development: C#, ASP.Net, VB.Net, Macromedia Flash MX, SQL Server 2000, and IIS..
Maybe Everquest... . . . naaah.
But I don't know why I can't pick up new skills like C, Perl, Apache, MySql, and PHP .... Maybe some Glade.. It'll just take time..
Games, while fun, are a waste of time - If I had spent all the time I did playing --
Everquest, Ultima Online, Ultima 4 - 10, Shadowbane, Lineage I & II, Ragnarok Online, DAOC, FF7, Marathon I & II, Excalibur, Earthbound, Pokemon (Don't ask), Killer Instinct, Zelda (All of them), Metroid (All of them), Battle Toads, Mario (All of them), and Faceball 2000... Does anyone remember faceball 2000? Faceball 2000 was the best NES game ever..
-- doing something constructive.. like playing basketball, or reading a book.. I MIGHT have been a better programmer, or I MIGHT have been getting laid right now instead of writing this message - who knows.
Nintendo, Sega, Sony, The company formerly known as Square, Electronic Arts, Bungee, Microsoft, and a whole long list of others are responsible for turning me into the monster I am today...
Linux - so far hasn't been detrimental to the cause.. It has in fact turned my facination w/ computers from instant gratification - to self motivation.
Now I have to close this before I add vBulliten, Apache, Mozilla, and Mandrake to the list of companies that cause distractions to Me