Pielorinho
Iron Fist of Pelor
As near as I can tell, sorcerers are foolish not to take a PrC when offered: about all they'll lose is new familiar abilities, which is neither woo nor hoo.
Wizards are almost as foolish: the extra few feats aren't really a whole lot, and are usually outweighed by PrC benefits.
Clerics usually lose turning abilities and domain powers: this is more of a tradeoff.
Bards lose bardic knowledge -- not such a big deal. Generally they should take a PrC.
Druids lose special abilities. Big tradeoff, not to be taken lightly.
All of the above, however, should think very carefully before taking another core class: loss of spell levels is a big, big deal.
Fighters, barbarians, rangers, and paladins can safely MC among the classes in this group: most classes are somewhat front-loaded, and the benefits are fairly equal for going up a level in any of them, and all apply to kicking butt.
Often, a level or three of rogue or monk is a good idea for a melee person, to get evasion and sneak attack damage (or wis bonus and unarmed strike and evasion). In exchange, you give up a point of BAB, an important tradeoff.
In my games, spellcasters tend to be single-classed, or have one or two levels of another class at most, unless they qualify for a PrC; if they do qualify, they tend to pour all future levels into the PrC.
Nonspellcasters MC much more freely, often having relatively equal levels in several classes.
Daniel
Wizards are almost as foolish: the extra few feats aren't really a whole lot, and are usually outweighed by PrC benefits.
Clerics usually lose turning abilities and domain powers: this is more of a tradeoff.
Bards lose bardic knowledge -- not such a big deal. Generally they should take a PrC.
Druids lose special abilities. Big tradeoff, not to be taken lightly.
All of the above, however, should think very carefully before taking another core class: loss of spell levels is a big, big deal.
Fighters, barbarians, rangers, and paladins can safely MC among the classes in this group: most classes are somewhat front-loaded, and the benefits are fairly equal for going up a level in any of them, and all apply to kicking butt.
Often, a level or three of rogue or monk is a good idea for a melee person, to get evasion and sneak attack damage (or wis bonus and unarmed strike and evasion). In exchange, you give up a point of BAB, an important tradeoff.
In my games, spellcasters tend to be single-classed, or have one or two levels of another class at most, unless they qualify for a PrC; if they do qualify, they tend to pour all future levels into the PrC.
Nonspellcasters MC much more freely, often having relatively equal levels in several classes.
Daniel