Windows 7 - Im doing some reserch

Hi everyone. Im trying to do some.....uh......."research"? Idk what to call it......probably a project. :s

Anyway , I want whoever has the time and wants to here to review ubuntu 11.10 , Os x Lion and Windows 7.The review can be whatever size you want , you can include details if you want or just point out the major defferences etc. Just don't post anything like "Linux and mac suck! Windows 7 is awesome!" i want reasons for your opinions , if you want to include those as well. I'll be posting this thread on an Ubuntu forum , Windows forum and mac forum and then i'll just compare all the answers. Thanks for participating and helping me with this (and sorry if this isn't in the right section , i wasn't really sure where to post this :s )