Sch here, I've played healer-type classes in almost all mmo's I've come across (i.e. Ragnarok Online, WoW, etc). Must say that I enjoy healing in FFXIV quite a bit. Most of the end-game dungeons require constant movement for all classes, so even as a healer its pretty busy.

I don't trust others with healing so its how I end up with that role. Only thing I hate about being a healer is being unable to see a boss's casting bar (maybe there's a solution but so far the dps/tank just call it out for me). As a scholar it's somewhat underwhelming, since the heal numbers are ridiculously lower than a WHM in terms of AoE heals and base heal numbers. It's useful being able to top off a main tank's hp with a shield (esp. for PLD), but overall may feel lacking (especially for inexperienced healers).