Welcome back Duncan! I gotta be honest, I liked earlier builds of Windows 10 the most because the Start Menu was, in my opinion, more organized and a lot like Windows 7's. The window animations were more fluid but I will say that they have gotten better. I do like the fact that Aero Glass is slowly coming back but it needs to be integrated across the entire OS instead of just the taskbar and Start Menu. I don't like the fact that Windows will become a service, which is the main reason I am a Mac user now. But I'll keep Windows 10 in Parallels to keep tabs on it.
build b4 1074 i had problems with hooking up external sound and video devices i had used it be on earlier builds i had it for a main op for like a month worked fine but any way figure to ask if you had same problems