Help me decide what to level first

[Midoo]

Hi. I'm Midoo and I'm an altoholic.

I'm a fairly indecisive person who's relatively new to EQ period, and through trial and (a lot of) error, I managed to narrow out three classes that are the most fun to me personally- the Cleric, the Druid and the Necromancer (refer to my siggy)-- but kind of gotten to the point where I stare at the character select screen sometimes for half an hour not knowing which one I should have as my main alt for when I'm bored with my Shaman.

All of them are fun. I enjoy the healing power and group usefulness of the Cleric, the mobility of the Druid and the solo power of the Necromancer equally.

Most people who played this game have a solid idea of what the endgame is like, and I would like to beseech (I had to google that word) your aid concerning what class would be the most rewarding to level up in the long term before the others.