Kulax

Fights I like healing:

Loatheb (Calling out who I'm going to heal during the three-second window is actually really fun)
Thaddius (Best fight concept evar)
Gluth (Because Beacon on myself and a Holy Light Crit on the Skeleton tank after a Decimate is love...)

Fights I hate healing:

Grobbulus (Because the fight is annoying)
Maexxna (Spiderlings adore me for some reason...)

Haven't done Raz, Harvester, Horsies, Frosty or K'T yet.