Ya, i've seen people keep saying they run out of quest and usually it's a couple of reasons.
1. They didn't do Kharas
2. They missed a story event somewhere
Things that help but aren't needed are
4. Monster Busters
5. Dailies
6. Dungeons
But honestly, I've stopped doing dailies by the time I got to Izlude since they started costing 1 zeny each. Just smooth sailing to level 50 on my Sorc.
I remember trying to help someone with his "No quest" problem and found out that he never did the "Get 5 purple potion" quest in izlude, which pretty much starts the entire Merman story line.
So honestly, Press your "L" key and see if you missed any quest. and if not, bring up your mini map and look for any question marks.
Edited by Tetsamaru, 15 June 2013 - 11:20 AM.