Like I say every time this thread comes up - fun is subjective. Good is also subjective. We can't tell you what you like, so you need to think about it yourself.
I got a druid to 51 and realised that I much preferred healing over anything else, so decided to roll an actual healer. QUOTE]
A druid is an actual healer!
Different tactics to a priest obviously, but nature's swiftness and in-battle res can be incredible life savers.
Stick a druid with a priest or a pally just for ressing and bob's your uncle.
I loved healing, as I often got commended for doing a great job.
Obviously you need to deal with noob pick-up groups that blame you if they can't manage their agro, but I'm sorry, I will keep the tank alive, and if a rogue dies, tough, someone can res him/her afterwards, hehe