I'm not sure you'd enjoy RF though. You seem to enjoy novelty builds and builds where main skills are active if I recall, and RF is kind of the opposite.
I do like builds that have a lot going on. Some of the most fun builds I've played:
Ele hit quillrain (it was shit, but 15 attacks/s and 150%+ ms is smooth as all hell)
poison blade vortex (plagueberer doesn't scale well past yellow, but it's very fun)
Anything with spellslinger (corpse explosion, reap, whatever. Having essentially 3+ active skills is great, even when they are on autocast)
I'd really like to play another raider tri-elementalist at some point, and an inquisitor that takes instruments of zeal and virtue. Or just another poison build. But I've yet to manage to theorycraft any that are both interesting and good enough.
I feel like there should be a fun RF build somewhere, since you can abuse stuff like cast when damage taken, and it gives +20% MOAR damage, but that too I have never managed to theorycraft.
My theorycrafting is not helped by how ridonk complicated the game has gotten. I saw the video Kjaska posted which was apparantly "2 days into HCSSF", and I haven't got a clue how to even get the items he talked about as being easy.
Once gem details get posted and PoB updates I'll prob try to make a dual-claw poison (viper strike + venom gyre?) and/or dual-claw tri-elementalist.