I've had Windows 7 before and I was really satisfied with that version. However I upgraded to Windows 10 yesterday mainly because I wanted to commit a clean installation afterwards to be allowed to change my OS from 32bit to 64bit.
I can't say whether it's worth upgrading or not. I like the design though. You can back up your files, upgrade to Windows 10, test it for a week or two and if you don't like it, you are allowed to get back to your old version (within 28 days since your upgrade afaik).