Only play druid if you think you can really get into its complexities and have fun. If you'd rather just get in someone's face and smash things, pally is the way to go.
I have both as well, though my druid is 90 yet (obviously) and I don't raid, so my limit is 5 mans, questing, and just general fun.
Everything about the paladin is straight forward. DPS:
Ret can be fun, but it's far from challenging. What I like about Ret is the utility as an offhealer is better than that of Feral from what I've experienced in this patch. Druid feral is a little more challenging to keep going but then again I suck at it. But part of that is Druids are a very very very complex class from what I've seen with a high skill cap to be good.
But from an aesthetics view point, Ret is better. But I like swinging a sword and seeing my transmog of judgement. Glpyhing judgement so it looks like Holy Fire is just cool.
Never liked Moonkin, the Eclipse function seems like Blizzards lazy attempt to give moonkin more buttons to push, when reality you are still only pushing two buttons, just depending on your eclipse.TANKING:
Again, Paladin is far more straight forward to do. Nothing extremely challenging about learning paladin tanking. I've always found druid tanking far more challenging due to the lack of the toolbox available to warriors and paladins. As a paladin tank, I always felt I had good control of pulls from the very start. Same with my warrior. However, my druid always felt a little hectic at first (talking about 5 man trash, I know...serious business).
Again, from aesthetics, paladin wins IMO. Shields, swords, Holy Fire Judgement, throwing shields, etc.HEALING:
I find druid healing very challenging. It may be that I started on a priest and then went paladin and never really tried druid healing in earnest so it always felt foreign to me in style. But good druid healers are just awesome. They are my favorite healer to have when I tank.
Paladin healing...again...straight forward. The only challenge is getting to the top tier by learning your utility spells, but even then it's not particularly hard. A few things I like about paladin healing, I like going in and swinging in melee range to regen mana. Makes me feel like how a paladin should be.
Aesthetics...about the same on this one.
But I keep coming back to my druid. Its a far bigger challenge I've found. What I don't like is for example, if I"m running feral, and I hope out of form to toss some heals, I feel vulnerable but if I'm Ret and I step back to toss a few heals out to help, I don't feel that I lose much survivability or time since I'm not changing forms. I'm still wearing plate.
Druids are a challenge as they have SOOOO many tools and techniques that maybe it's beyond my skill level to master, but I still like trying.