I recently dinged 90 with my priest and leveled just as Shadow. Now my guild mates want me to have a healing spec too. I never played a healer, so healing in general is completly new to me and I have to decide whether to play disc or holy.
By reading the stickys, disc sounds fun from the atonement aspect and seems to have lesser spells then holy. That sounds easier, but on the other hand, preemptive shielding sounds more complicated than "normal" reactive healing. So both specs have their pros and cons. I know, most people would say "try what YOU like more". This may be true, but any thoughts about the more easier way to learn healing as a priest in general would be appriciated.