Highly recommended. Probably my favorite part is the asymmetrical approaches of the races. Interested in firepower, maneuver warfare, and positioning? You'll enjoy the Terrans. Want to achieve the dream of bloodless (for you, anyway) war? Try the Protoss. Want to be an efficient Darwinian nightmare? Pick up the Zerg.
It's this mix of styles, to the point that the races feel like they're in different genres, that makes SCII such a varied game. And that doesn't even account for different playstyles within the races.
To build a mass air fleet you need a lot of resources and a lot of time. A skilled opponent will try to deny your resources or simply attack you earlier.
Always worked when you played someone who didn't know what they were doing but a solid micro setup with scourge or wraiths would always destroy this setup :)
If you like asymmetry and board games, check out Sidereal Confluence. It's a trading game between 9 races with very different setups (one is playing a licensing game, one is playing an extortion game, one is playing an investment game...).
I played Protoss, but my favourite thing was always being Zerg and just sending thousands of zerglings into the enemy base, gnawing at every building at once, like a flood of little cockroaches.
1. Everything other than foot soldiers are robotic. They are called "Zealots" for a good reason. Why risk your life when the bots can do all the killing while you sit back and eat popcorn?
2. Your foot soldiers don't just "die" --- their armor units each have a built-in teleportation gadget that bails them out when they got critically wounded.
3. They then go back to their homeworld, where they get converted to mind-in-a-tank cyborgs (which is responsible for the "hydraulic fluid" you see when a Dragoon dies).
They do, but their "shtick" is unit preservation: all their units have regenerating shields, and their units generally have high health/cost. Some of them have additional protective abilities, like the Sentry's damage-reducing aura, or the Immortal's Barrier. Finally, when raw shielding/toughness isn't enough, many of their units are quite mobile, allowing wounded/deshielded units to retreat.
It's this mix of styles, to the point that the races feel like they're in different genres, that makes SCII such a varied game. And that doesn't even account for different playstyles within the races.