By leveling through this dungeon finder feature, does that mean you won't be able to do some quests (do quests have level caps) or merely that you'll be too overpowered for some quests to be fun?
I do intend to see as much of the world as possible.
Oh I ordered the game yesterday, the WOW and Burning Crusade combo package (too bad there isn't one that includes Lich King too), so you'll all have one more feeble little fish to kill when you go PvPing soon.
Sort of goes both ways, before a lot of the recent changes. It was slightly painful to level in some areas.
And completing quests meant killing one mob, dying, res, kill-die, res, and then get the boss.
With your first toon this sucks since you didn't know the alternate zones to quest in, to help you level past an obstacle.
Now if you get stuck and can't find help, you can hit dungeon finder and level then complete the quest and go on.
With some ghost town areas, you'd likely be doing this a lot for the first toon, or ask the guild for help every day.
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As far as level caps, yes there are, you can still do them for reputation and a little gold.
But the experience dies quick when you get above a certain level for the area.
Some areas are fun, and some are god awful pains running from one side to the other. Bit better these days with the mounts coming soo quick.
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And nothing wrong with being "overpowered" for a zone, since you also need reputation, and going back and cleaning up all the quest in areas is a way to get you the reputation you need for that Kodo, or other races mount.
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First toon, expect to die a lot, if it ever get frustrating, MOVE ON to the next zone. If you get to Redridge you understand some frustration, and STV you'll get tired of hunting pages and killing beast for sport. The hunting beast for sport starts a "mastery" chain at lvl 30 and ends around lvl 75, a lot of killing beasts in this chain.