Ok, another of my weird ideas...
Instead of making classes "open/closed" regarding a characters race, and, instead of the "advance" level limit system ("sorry mr. we can't teach you how to cast better spells/fight more efficiently/etc. after all you're just a 'insert race name here', next client please!!!") I thought of a common/uncommon/rare class system.
The Idea is simple, the GM considering the relationship race-class on his setting categorizes each possible combination as "COMMON", "UNCOMMON" or "RARE" (if he want he can include "prohibited") and the he moves to step two: drawbacks
A Common class has no drawbacks.
An Uncommon class will have one minor drawback.
A Rare class will have ether two minor or one mayor drawbacks.
Drawbacks should be simple mods:
-10% earn experience.
-2 on reaction rolls with other characters
Extra cost on related goods?
Penalties to secondary skills rolls/less starting secondary skills (I'm working on a simple system for these).
Ok, now the "mangazo" as we say here (which is the sudden asking of help or ask for some big help):
Can you help me to create some minor/mayor drawbacks?