I was still content with XP but only had the 32 bit edition. Since support ends in April of 2014 and wanted to run some 64 bit software I upgraded to 7 at twice the price I would have paid for 8. I am absolutely delighted with 7. I had Vista for 2 days when it first came out as my tech support son needed a virgin install to test some stuff and I happened to be building a new system at that time. I hated it and was glad to see int go.
I am using all types of os. For my desktop i sue Xp & secound desk work on vista, laptop is run in 07 and my vps server runs on 2012 latest windows os.