Yeah, Druid is really a raid spec. They give healing and lots of boons and buffs, but they don't do much for soloing. Soulbeast is good for damage, but you need to find the right pets. Smokescale is one. It gives Fury and other stuff to really increase damage.Druid didn't really do it for me (except the fast movement passive). I tried Soulbeast a bit after Path of Fire came out, but I didn't find it that exciting either. I think it's more about the aesthetics than anything else! Holosmith does look kind of cool. I think Elementalist and Revenant are top of my 'looks interesting' list, with possibly Guardian to follow. I will take another gander at Holosmith, though.
Holosmith and Scrapper can be good for damage. Scrappers been given a few buffs recently so you can load up on the Elixirs and wander around smashing things. Holosmith is just crazy damage.
I'm personally a fan of the Dragonhunter. I tried Firebrand when PoF first dropped, but I prefer Power to Condition Damage. It's very similar to base Guardian, but with some great PBAoE damage with their traps. I have found a good Firebrand build which can really stack up the Burning damage, but again, I prefer power.
That said, Mirage has a simple playstyle for being Condi, it has so much evasion it can dodge sunlight and piles on so many different conditions, and so many stacks of them, the it melts things. Chronomancer can also be fun. I don't play the optimal build which uses Sword/Sword & Sword/Shield. I mainly just play Greatsword and spam out Berserker Phantasms, the two high damage Wells and then Shatter.
I've got 3 of each class, so one of each elite spec and 1 of the base class. There's usually (but not always) something fun to play regardless of what class/elite spec you're running.