Hello I am a Joe, what are you?
I've been playing on IDMC since 2015 & had the pleasure of being a part of the staff team on 2 occasions. I'm excited (as I'm sure we all are) to see the growth of CraftMC as a completely new server.
CreativeRP was a hit with players, I think there's more reason to go with that. But creative gamemodes are less restrictive so even if you're not a fan of RP you can still just use it as a regular creative gamemode.