AFK/Netflix clerics tend not to make it to 50, I saw a few with a bad rep when I was levelling my SK (they'd ninja AFK or slow the group down by going to "walk the dog" etc).

If you want to be a cleric, be prepared not to be the AFK type unless the tank/puller/etc calls one.

Clerics can be stressful at 39 when you're still learning the CH duration, I remember purple lining a couple of people :D

Since you have a solo char, I would say go Cleric.

I parked my Cleric and am slowly working up a Shaman soloing and duoing with a friend (well, haven't had a chance to play in a few weeks...soon though).