I wouldn't dare rate this less than 10.
I've had so much fun playing this game over the last 7 or 8 years, and particularly so on Battle.net. The UMS maps in particular give the game so much diversity, allowing the player to pretty much never get bored of the game. Some personal favorite UMS maps of mine include: Heaven Bound, Bubble Bound, Pick your D, Mini Town Defence, Cat and Mouse Winter Best, and of course Crash RPG. I literally have never gotten bored of these UMS scenarios, and I actually created the first proto-map for Cat & Mouse Stacked. Oh, I almost forgot to mention my all-time favorite UMS map, Sorcery II RPG. Simply amazing.
Of course many players prefer stick mostly to Melee and Top vs. Bottom. I do enjoy these games as well, and though im not very good at them, i have been improving (Though its hard with all the high-level players around). Even becoming a National sport in Korea? Thats just amazing.
I seem to be leaving out the campaign mode though. Honestly, i've never had the attention span to finish the whole campaign mode as its rather boring to me, albeit that the story is interesting and I know it fairly well.
Thats about all I have to say about it. If you've never played this game then run to the nearest store that carries PC games and grab a Starcraft battle chest. No seriously, why are you still reading? Go! NOW!!