Originally Posted by
iWolfBanei
Okay;
Resto Druid - Very similar to how it was in WotLK. You revolve a lot of your healing around letting your Lifeblooms 'bloom' though, and you generally cant outheal the damage a lot of cleaves do. Kind of frustrating, but their output is being buffed slightly in 5.2. Cyclone is being put on the same DR as Poly, but if you have a Warlock or Shadow Priest friend, then that'll be the way to go.
Feral Druid - Extremely bursty, and nearly all of its CC is being taken away. I played Feral in Wotlk and Cata (4 seasons in total), and I hate the playstyle it has now. It's basically become a slightly less in-your-face Warrior type class. I don't think Feral will be viable next patch purely because it brings nothing to the table other than brute force.
Mage - Frost is very strong. Fire is very strong. Both are pretty much reliant on being able to rotate your damage properly making use of a new spell called 'Alter Time'. You try and get all your procs up, press alter time (It basically 'saves' all your buffs, health, mana, position etc), you use all your procs for damage, press alter time again (Puts you back to the 'save' you made) and do it again. It basically adds up to huge burst, but Mages are losing blanket CS next patch and I don't think they will be as good as they are right now.
DK - Unholy is very different to how it was in WotLK. Rune recharge is also a lot slower, and the whole playstyle of DK is very slow-moving but extremely diverse. I'm not sure I can explain it well, but you basically won't know what you'll be doing in a couple of globals (whereas other classes you can pretty much figure out a gameplan for the next 10 seconds). Still lacking in the being-trained department but are getting some neat changes next patch. They'll become more popular, but I wouldn't recommend the playstyle.
Rogue - Their damage is pretty good but their survivability is dog. They are a lot different to how they were in Cata and I personally don't prefer the new playstyle, but a couple of people do. They are getting some buffs and tweaks and I've got a pretty good feeling that their burst is going to be disgusting next patch.
Monk - The new class, they are pretty interesting. Blizzard are packing them full of juicy goodness to try and get their representation up and there's a pretty good chance they'll be one of the best classes next patch. Their playstyle is very unique, as a DPS you rely on movement and 'bursts' of damage and speed. Mobility is key and you are pretty good at shutting down 1-2 people (like a more in-your-face rogue). The healing spec I dont know much about, but it's pretty unique too.
Judging by your previous specs, I'd say you'll either enjoy Druid or Monk most. Resto is much like it was in WotLK (Balance is fun too!) and Monks are the new class on the block, so you'll be starting fresh the same as everyone else for that class.