I don't have particularly strong opinion about UCP so far, that's the only beginning after all; but I'm liking the ambition behind it. I tend to eagerly welcome changes of any sort (ones that leave positive effects, of course!), so I'm anticipating what it'll bring to the table. Especially looking forward to new features and skin!
The modernized RC and user pages appeal to me so I'm good with both. The foundation of new editor seems okay, too, but it won't really be effecting my experience much because I prefer to type up everything on my own with source editing, haha.