although Ubuntu may be different somewhat but the look and the feel is complete rip off the windows, unlike mac which is a totally different type, i used the latest version of ubuntu i found no different on how it explorers and portrait, this alone shows the willingnesses of using windows among computer users so they made something same but different in infrastructure .
And FSTrulz pls stop saying its free, we here at FST anyway dont pay for any software to use atleast not for windows, so it doesn't make any different whether ubuntu is free or not.
and stop saying about drivers being installed instantly on linux, did at any time a standard hardware didnt response on windows, i have quite a lot of USB/external and internal hardwares and non of them ever gave me any problem with installing on vista not to mention XP.
unless you use all chines HW which have no windows support whom btw dont last long you wont have problem with drivers on windows.
graphics and audio drivers come with both OS's by default but their not much a use on both so anyway you must get manufacturer's driver which in linux case is a non official driver.
software range which linux has is nothing compare to windows not to mention gaming which is almost zero, and please dont talk of work around to install windows stuff on linux, we use computer so it do our work not we do its.
simplicity is something which modern OS's are offering more and more and linux is creating more and more workarounds.
security is one thing ubuntu users may be proud of it, well people not using linux much is what make it safe and out of hackers radar, its not worth the time to waste and not getting to newspapers headlines.
personally i think staying away from unnecessary sites and p2p application is enough to protect yourself.
Edit:
i forgot about vista...
am using it since the release and so far i have no problem, may be some minor application crash but this is always the case with new versions, not only windows but any software, it takes some time till they are fixed, my guess would be SP1, apart from that there is no issue.
its not much a resources hogger if you have atleast a 2Gb ram(600 or 800), and imo if some1 in today cant have that much ram then its a waste to have a computer. i have 2gb and what vista uses with all function on and lots of background application and addons(StarDoc) running it uses 800Mb of my ram.