My main is a resto Shaman, but I've been spending my spare time either leveling a Rogue or gearing up my Ret Paladin. It is a completely different experience. I've spent hours in the battlegrounds and have managed to earn the honor for the Merciless Gladiator's Greatsword. Thus far is has been a real challenge for me.
I have a harder time with the Paladin than the Rogue. In the battlegrounds my first reaction when I see someone going down is to heal them. I do drop an emergency heal here and a bubble there, I know that my heals are generally crummy. I should just keep swinging my sword and leave the healing to the healers. With the Rogue, there is no option for healing, so I just keep Slicing and Dicing away through the levels. On top of that, I'm used to trying to get away from my opponent, not trying to stay on top of them. The whole paradigm shift has been difficult for me, but I've learned a lot from it.
How do you feel when you play something totally different from your main?