Here's a question: is there any reason to play Holy, other than to spam Guardian Spirit on Valithria? I've been playing my Holy Priest for maybe over a year now and I have acquired quite the gear and the experience on him. However, it seems that whenever I join a high-end raid (ICC/RS) people ask me everytime if I can go DISCI. Every time... So, again, is there any point in playing Holy when everybody wants Disci? And also when Disci outperforms Holy by simply spamming bubbles and Penance on tanks/low hp targets? I mean, even back in the day, when I was part of a raiding guild, picking a Discipline Priest was favoured over picking any of the Holy ones from the guild. I dont know, it simply feels like the time I invested in learning my spec is simply going down the drain.
TL;DR: Why bother to play Holy (besides the fact that it's a bit challenging until you get the hang of it), when everybody wants Disci and also you will usually get outperformed by the bubble-spamming Priests?