My main on live for years was a shaman (had 3 at different times) and they're a great class. The slow spell line is unparalleled compared to the enchanter one so a great group setup requires a shaman, not to mention the amount of awesome stat buffs you can give out.
Don't be discouraged at playing any class because there's already too many of them. If you want to play a lesser played class (at the moment: mage, paladin, bard {very few high level bards}) then go for it... but ultimately a shaman is an excellent choice, you guys make a cleric's work much easier as a backup healer/slower.
If I hadn't done them to death on live I'd roll one here
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