I'm debating on changing my spec to something more priestlike...

Healbot:
Uberhealer, nothing else, can't damage a flea or level come BC

Power Infused Disc spec: (benefits)
Smite for 900+
~15% crit
Inner Focus (talent I missed most)
Possibility to crit in the 2k+ range (amped)
Larger mana pool
Cheaper instant spells
Heal better too
(leveled with a similar spec, but no PI)

Shadow (current spec) likes/dislikes
Like:
AWESOME DPS
DoT, DoT, forget (go kill something else while previous target dies)
DoTs ticking for 300+
Vampiric Embrace healing for 90+ per tick
Dislike:
Low survivability
No AoE
Mini mana pool+poor regeneration

Let me know what you guys think  8)