Can we consider Roller Coaster Tycoon to be an RTS game (in the original, you weren't allowed to construct anything while paused, so all actions needed to be done as the clock was ticking)? If so, it was my favorite way back in the day.
Age of Empires II was a loved title as well. It was nice that it was resurrected for modern computers recently, though I've unfortunately lost all my muscle memory needed to play well.I would not call Roller Coaster Tycoon a RTS. I'd personally call it Economy strategy. Witch isn't bad, I enjoyed RCT growing up. I'd personally love a new one, that had a muitiplayer Feature, and you could visit other peoples parks, and compete in how much money, how many guests, and compete for guests and money. I wouldn't also mind if they re-made Jurassic Park, Operation Genesis. For a PS2 game, it was amazing and ahead of its time. I'd be willing to drop the cash for that in an Instant to create my own Jurassic Park again.
RCT series to me personally is just a Simulation game.