I have a level 60 Druid and a Level 60 Rogue.
I think with this game you have to decide early on what you want to do. Do you want to Heal or do you want to do Damage.
On my Druid I loved healing, still do infact which has resulted in me abandoning my Rogue and making a new Undead Female Priest whislt also playing my Night Elf Druid.
Now the reason I love Healing is because you feel that the group is dependant on you. The 2 most important roles in any group are a Warrior and the healer. If you have a poor healer in your group then you will probably struggle just the same as if you have a bad Warrior.
Whereas any of the other classes you could have a dodgy player in the group but still succeed. What I am trying to say here is that as a Rogue you feel pretty worthless. Yes we do good Damage but the fact that I can be Selfish and give all the work to the healers to keep me alive sometimes it feels boring. Another thing is that all you do is Target a Mob, Hit the same buttons over and over again and hope that you get some heals every once and a while.
As a Druid / Priest this is completely different. The raid is often depending on you to do good, this puts added pressure on yourself and I feel that this increases the enjoyment. If you keep a Tank alive you feel that you have achieved something.
People have mentioned the Shaman, and they are good but I beleive that in end game t hey can be quite dull and boring. Most of the Shamans i have seen play just spam the ChainHeal and that is it.
If I was you I would go either of these classes:
Undead Warrior
Undead Priest
They are the 2 Most wanted classes in the game and you will never really struggle to find a group to instance with. I have said a Priest over a Druid because end game you only heal, and for me having a Wand is a slight advantage because you can still do a little bit of damage whilst staying out of the thick of things. As a Druid you only stand away from the Mobs and never do any damage what soever.
I have 2 Characters, one on Laughing Skull Realm which is PVP(
Ascendants Of Evil)
and another on WildHammer.
PVP is near enough dead on this server and many people find it annoying to be out Questing and getting killed.
I'd recommend PVE for hassle free questing, whilst still having the ability to join WSG and AV
So all in all, join a PVE server and be an Undead Warrior or Priest
MrMacca.com
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