StarCraft has the property of having those three unique races, it is still somewhat fun to play, I replayed the first Protoss campaign a month ago or so, and I feel like playing the one of Brood War. The campaigns of the original game are very very easy though, and the strategy is almost always to starve your enemy out of resources whilst doing an effort to take out heavily towered bases, so they tend to get boring. Brood War is a little more challenging due to the higher difficulty and the fact that resources for your enemies are unlimited from what I can tell.It has a few advantages compared to StarCraft II. PurplePoot argues with me that it's my micro or macro or whatnot, but from my experience, StarCraft 1 is, micro-wise, a lot more like WarCraft III: first, it has a reduced number of units compared to StarCraft II, and second, the ooold pathing system makes units sometimes wander around in circles and take longer to lock on the pointed target. Meaning, you can actually better preserve your units.In StarCraft 1, both in the campaign and skirmishes, I could actually micro my Zealots, while in SC2, it's ridiculous to bother, because 50 resistance (shields, which don't have a damage discount / armor unless upgraded, from 60 on SC1) in a game where armies are always composed by 30 units or so is just a waste of time or even impossible in most cases. Now, I was playing (in SC1, both campaign and skirmish) with a speed of one point below the maximum, but this is certainly not what dictates the large difference.The shields concept was interesting, but it would have fit WarCraft III way more, because in StarCraft, especially SC2, it doesn't do much of a difference because people don't care about them; units are supposed to just charge into battle and die, in opposition to WarCraft III where micro plays a determinant role -- all the items you're provided at each race's specific shop, as well as the game's mechanics themselves, are centered around that. And you'd best realize this quickly if you're looking into playing the game.
As for ScumEdit, it's a step back from the World Editor, just as World Editor is a step back from the Galaxy Editor.