healing requires a great deal of patience along with extreme micro managing. many healers don't last in guilds nearly as long as dps (those that make past trial). Many healers get upset when another healer is complimented as if implying that they weren't doing a good enough job.
so my question for all those healers
how long did you before quitting or taking a break?
if you are still healing, how long have you done so?
how long have you been in your current guild and what is the level of raiding/pvp that you do?