I live for healing in MMOs - it's all I've mostly done for years. There is a certain feeling of satisfaction knowing you are part of why everyone else is still alive (along with the tank, of course). Plenty of times have I encountered rude people, and it can really be disheartening, but I still keep at it. Most people do appreciate their healers! Just keep that in mind. It's not often said, but I believe a lot of people are grateful for the people willing to play them. I've wanted to play DD a few times, but the amount of "We need you," I get from friends and others is enough to keep me around. I really enjoy feeling useful.

There will always be a level of elitism in MMOs, unfortunately. The grind to be "the best" is why they are addicting to some. But that is usually the smaller % of players from my experience. So if someone is rude to you, don't feel too bad. I try to imagine they had a bad day and are just upset.