I've played paladin for around 4 years, seen it all... bla bla.
I can say ret paladins are most faceroll and easiest class to play when it comes to pve and some sort of pvp.
First of all, in pve you can do OK <--(doesnt mean you pwn dmg meters) by spamming cast random macro, but it gets the job done quite ok.
As for pvp, you get the job done there too in a way or another, first, you do dmg by pressing buttons and they got short cd, nothing you need to watch for, you press buttons damage happens, like GC said.
In arena it's different, you still get something done by pressing buttons but high rated paladins usually do much more where skill really shows, such as using freedom on self/party members, Hand of protection, sacrifice, buble, heals, sacred shield, burst damage/focus damage, CC, stun and so on which shows up on other classes too.
The problem is ret pallys have it too easy, like said, pressing buttons makes damage happen and thats how you kill in the end.
I'm saddened how ret paladin "fix" turned out to be.
Ret is no fun and its overpowered and there is too many of them without clue pressing those 4 buttons and owning everyone up depending how geared they are.
I dont hate ret paladins because they are ret, I hate them when they are bad, when they dont deserve it, like most of the times in BGs on my rogue, I get instantly bursted down by ret pally out of nowhere.
Anyway that probably made no sense but I agree, bad pallys are hated and should be and ret pallys are faceroll and too easy, but skilled pallys stand out, sadly not in faceroll sessions in arathi basin.