Ditto!
I keep trying W10 (stable, slow, fast, etc.) on my SP3 (i7) but always go back to W8.1, eventually. W8.1 so far can't be beat in table mode (IMHO), which is the mode that use the most.
I have my previous laptop (ThinkPad) that I've put W10 on, and it's fine, because it's in "desktop" mode all the time.