Most Over/Underrated Class?

[Luccan]

Monk and Ranger are the two least popular as far as I know.

Monk has the usual problems of Cool but inefficient competing with Fighter and Barbarian.

Ranger is more mixed than a Fighter.

So same as every edition, but with the twist that the Fighter is better than previous editions.

I don't think Monk is unpopular, just the people who dislike it really dislike it.

I think Ranger is preferred to Fighter in 3.5, but that just might be on the forums.