I like Teen Titans Earth One. (I don't care if I ever see it again, but I like it!).
That said, the "re-embracing the past" Rebirth brought up didn't really pan out. They pretended to do so for a while, but DC right now sure as hell has absolutely no respect for all the things they said they were "bringing back". And once the JSA gets back, it will be a short amount of time until they start being treated like crap, too. So, personally, I'd prefer a "hardcore, no one gets out alive reboot, forget absolutely everything and everyone you like, this is actual new stuff" style reboot.
It's not gonna happen, but I'd be more than fine with that. Finer then with what they're trying right now for the 11th time, anyway.