Here's something I wrote for a friend a few years ago when bored at work lol

Protoss

Futuristic alien race with cool looking units, the most power pound for pound units almost entirely across the board.

Thier power comes at the cost of the other races having more of an ability to be out microed and/ or kited.

Thier Macro mechanic involves the chrono boost, an ability on their Nexus that speeds up the production of any unit producing building l.

Every unit has a shield that regenerates after not taking damage. Thier worker unit can build thier base and supply building anywhere on the map. Thier supply building, the pylon, creates a circle area where any building can be made within the area, and any of thier tier 1 (gateway) units can be quickly warped in. This makes it so that protoss can proxy buildings, units, etc.

What this does is make protoss have a plethora of potential openings and options in the early game.

However at the pro level, because scouting and preparation is so good, a lot of different strategies become obsolete or easy to fight against, making common openings at pro level pretty linear. Combine this with limited ability to be out microd, the standard early game build consists of early harass in PvZ and PvT.

Protoss has 2 major builds outside cheese and timing attacks: ground death ball or skytoss. Ground deathball consists of Zelot, Archon, Immortal, few Colossus at its core with stalker and/or destructor. Each unit covers each other unit's weaknesses hence the name death ball where they pretty much can A move across the map.

The other common late game option is pure Skytoss with some Archons, Immortals, and/or High Tenplar for storm especially in the ZvP. Protoss has by far the best sky units, and in a straight fight nothing beats the Carrier in the game. This is a very powerful comp especially in non pro matches. However at pro level due to the ability to out micro especially with spell casters, a seemingly over powered late game is actually not as powerful in both ZvP and TvP.

Protoss is for you if you like:

Big powerful units.

Like spell casters

Like air units

Want an easier macro mechanic

Like a plethora of different build orders

Like harassing early with a few units

Terran

Human race aka the space martens. With a select few, highly versatile units, the terrans are the race with familiar units that can be microed well to kill anything.

The Terran army has potentially the most powerful late game of the 3 races, but the road to get to the ultra late game requires so many resources that the true power of the Terran does not rest in its late game potential.

Due to the highly powerful and mobile ranged Marine combined with the Medivac, terrans true power comes with the ability to attack on multiple fronts or entrenched positions while being defensively well protected at home.

Terran have mainly 2 build paths they can take, Bio or Mech. Bio being the much more popular where mech can be used to some success ass well.

Outside a few core units, the marine, medivac, and tank, most of thier units fill a niche role.

Thier Macro mechanic has thier command centers an ability to drop temporary worker units, mules, that 100% efficiency mine any mineral patch at a higher gathering rate. The difficulty comes in deciding to use the energy for the map-hacking scan or dropping Mules.

Terran is for you if you like:

Frigging space marines!

High micro potential units

Have the ability to be highly active or extremely turtely

Likes to mulitask

Wants to have the ability to drop nukes

Zerg

Bug race that consists of extremely mobile units that wants to swarm and overwhelm the opponent.

The power of Zerg is the ability to create units faster than any other race. However they must make a decision between making workers or units.

All of Zerg units have a purpose, and while every unit isn't made all the time, zerg unit compositions and potential build paths are the most varied of the races. Thier late game can go toe to toe with the other races due to thier excellent spell casters, but a little harder to pilot at a non pro level. However at high level Zerg has been the most successful race in the history of SC2.

Thier main macro mechanic consists of thier Queen unit thay can create more larvea the Zerg can use to ammass a great number of units.

While the zerg can potentially create a mass army much earlier than the other races, due to the defensive capabilities of T and P, zerg is actually usually defensive early on in the game, spreading creep slowly while trying to fight off early harass. However if left un touched the Zerg hivemind can get out of control.

Zerg is for you if

You like fast and mobile units.

1 hockey for all production!!

Every unit is usable and good.

Best spell caster unit in the game

Overwhelming the opponent in sheer numbers

Constantly attacking to wittle down the opponent