Rank the classes.

[Arakash]

I actually check out the class/race populations on occasion and it has been pretty consistent since that one post, years ago, that had a detailed list.
However, it does seem that the classes are actually pretty evenly distributed these days. Even quite a few Pally's running around recently.
I don't have enough info on group desirability to comment on that.

Class population:

10: Druid (by far)

6/7/8/9:Necromancer/Enchanter/Shaman/Monk (these classes trade places depending on day/time with Necro/Enchanter usually played more than Shaman/Monk)

3/4/5:Cleric/Bard/Warrior/Rogue/Shadow Knight (these classes are also evenly distributed with Cleric/Bard most popular and SK least popular):

2:Mage/Ranger/Wizard (Mage/Ranger more popular than Wizard but roughly the same population)

1:Paladin