Update:
When I did the simple upgrade to win 10, shit was weird. Was having weird stuff with old programs and also with my dual screen setup. I didnt mess with drivers or anything, just went ahead and did a clean install off a flash drive. But anyway, for me, the upgrade seemed wonky and looked like I was gon have to go through a bunch of settings and shit to get it to behave right. imo, its not worth it. Even when just performing the install, shit got wonky. Screen brightness was doing a kind of slow strobe, which maybe is intentional, but it was all laggy... and the fonts looked real low resolution. Probably just driver stuff, but still. Seems like more effort than its worth to get an upgrade to work.
Clean install though was flawless for me. So far, I have had no hiccups. As of right now, I am glad I switched from 7. Boot and shutdown is faster and file transfers from disc to disc and through usb are way faster. I like the clean aesthetic and actually like the new start menu better. Also really liking the virtual desktops. So far my only gripes are that when the search function access a browser, it always uses bing. Cant wait for someone to fix that. Havent tried Cortana. Also, there is less window border color customization than in 8 or 8.1. Oh, I do like how windows can snap to edges or corners faster/easier now.