Just a personal view, as a recent convert to Linux. Until very recently, I would have said there was a very good chance of moving to Ubuntu from Windows 7 making you happy. But I would say, it depends which Ubuntu you plan to move to. Getting to know Ubuntu with version 9.4 was for me a great pleasure and a happy adventure. I moved up through 10.04 and 10.10, and things got even better... but since upgrading to 11.10, things have gone downhill very fast. I repeat, this is a personal view, and I'm no expert -- but maybe the fact that I'm NOT an expert makes my view worth more to a fellow non-expert? It really does seem to me that some very bad decisions have been made about the design of 11.10; it has just got much much harder to decide for yourself how you want to organize your work-space. It also seems to me that everything works much more slowly now, which may not worry those with superfast machines; also, again this is personal experience only, but quite a few things which were working fine on my previous installations now work unreliably.
My advice? Move to Linux, wholehearted recommendation, the Linux world is brilliant, a real joy!!! Move to Ubuntu in a 9.xx or 10.xx version, for sure!!! Otherwise, consider a different flavour... I seem to gather that the other obvious "people's choice", Linux Mint, is beginner-friendly too. Ubuntu 11.10 is not.