Henry
Autoexreginated
THe best way to put it in my opinion is: Do you like your gaming systems as one price fits all, or a la carte? 
A class based system, no matter how flexible, still gives you several abilities at once, some of which do not necessarily have to do with one another. The ability to heal with magic does not imply the ability to turn undead. The ability to cast spells well does not imply a poor attack bonus. The ability to cast arcane magics spontaneously does not necessitate having the ability to call a familiar for cheap.
The advantage to a class-based system however, is that a DM does not have to think as much about issues of balance between other players - how importantly DO you weight that familiar, for example? How important IS the ability to turn undead or cast spontaneously?
Ask 20 designers that question and you'll get 25 responses.
With a classless system, and with the ability to buy a la carte, you come into the problem of weighing different abilities one against another. Is turning undead worth the same as spontaneous healing? Is a sorcerer's "spells known" limitation worth the same as a paladin's lawful good restriction? Is the sorcerer's spontaneous casting balanced successfully by an alignment restriction and an armor restriction? The mind boggles.
If someone can come up with the perfect skill-based, points-driven classless system that doesn't bog down the rules to play too much, let me know. You'll have about 7 to 12 converts for life in our group.
For now, however, d20 gives me:
-Customizability
-Sensible mechanics
-Speed of play
-The ability to switch between bashin' heads and solving intrigues easily
And that's what I need to properly waste my weekends.

A class based system, no matter how flexible, still gives you several abilities at once, some of which do not necessarily have to do with one another. The ability to heal with magic does not imply the ability to turn undead. The ability to cast spells well does not imply a poor attack bonus. The ability to cast arcane magics spontaneously does not necessitate having the ability to call a familiar for cheap.
The advantage to a class-based system however, is that a DM does not have to think as much about issues of balance between other players - how importantly DO you weight that familiar, for example? How important IS the ability to turn undead or cast spontaneously?
Ask 20 designers that question and you'll get 25 responses.
With a classless system, and with the ability to buy a la carte, you come into the problem of weighing different abilities one against another. Is turning undead worth the same as spontaneous healing? Is a sorcerer's "spells known" limitation worth the same as a paladin's lawful good restriction? Is the sorcerer's spontaneous casting balanced successfully by an alignment restriction and an armor restriction? The mind boggles.
If someone can come up with the perfect skill-based, points-driven classless system that doesn't bog down the rules to play too much, let me know. You'll have about 7 to 12 converts for life in our group.
For now, however, d20 gives me:
-Customizability
-Sensible mechanics
-Speed of play
-The ability to switch between bashin' heads and solving intrigues easily
And that's what I need to properly waste my weekends.
