1) Since 1.0's Beta, although I did take a hiatus a few months after 1.0's release until the ARR beta.

2) Mouse and Keyboard, I've never really been comfy with gamepads

3) That really depends, healing new unknown content is exciting because of how fast people can get flattened and which inturn asks for quick reactions to try to save people during prog. Unfortunately the majority of damage incoming is so absolutely predictable that to a point, it's really not that hard to predict the likelihood of other people making mistakes.

4) Extremes and up. Outside of a few specific points in levelling dungeons, healing in casual content is barely worthy of the word.

5) All 3 at 80 and geared to BiS. WHM is my favourite by far, I'm not entirely sure why, I guess just because it's straight forward with a toolkit that wouldn't be out of place in Everquest or Vanilla WoW. I'm old and stuck in my ways Least favourite? AST I guess, I strongly disliked how the 4.0 changes played and 5.0 just ruined the job for me.