I don't have anything in particular to say to the poster who opined that clerics shouldn't heal their fellow party members, because you'll have to wait a week or so for me to quit gut-laughing.
I have seen plenty of prestige classes that would be just as good - even much, much better - as a chain of feats. The exotic weapon master from
Complete Warrior is a perfect example - there's honestly no reason for this to be a class, because it's all about pseudo-feat abilities. Ideally, the vast majority of a prestige class's abilities should be things that wouldn't be appropriate as feats - spellcasting, supernatural and extraordinary abilities,
et cetera.
Hell, I've seen
base classes that ought to be feat trees -
Complete Warrior samurai, anyone? Tell me that shouldn't be a fighter with two-weapon fighting feats and a few intimidation-based feats.
I absolutely agree with those who say that they don't feel that all people who are called assassins should be members of the assassin prestige class - even within the confines of a gameworld Order of Assassins.
However, I think this is a strong argument
against the concrete binding of prestige classes to gameworld organisations - instead, I encourage people to use them only when feats and/or careful multiclassing won't do the job. For example, I don't think the assassin's death attack ability should be turned into a feat - so for those characters whose
modus operandi as an assassin involves a little magically-assisted stealth and infiltration and a devastating single attack that leaves their victim dead, the assassin prestige class is worthwhile. For entirely magical assassins - spellcasters using their magic to cover their tracks, for example - or others who don't use the "stealthy murder" approach, the class isn't necessary.
I guess what I'm really trying to say is this: don't believe every prestige class ought to be one, nor that everyone in the role the prestige class is intended for ought to be a member. Prestige classes are a tool for the DM to use in designing his world and for players to use in realising a character concept - but common sense
has to be brought to bear on both sides.
My nickname is Irish Gaelic, but it means "son of the Goddess".