FireLance
Legend
Some concepts that would probably be less popular now than earlier:
Race-class restrictions: e.g. dwarves cannot be wizards, elves cannot be paladins, etc.
Gender differences, especially if one gender is strictly inferior to another: e.g. female PCs are exactly like male PCs except that they have a maximum cap on Strength.
Level caps, especially if they are not applied across the board: everyone retires at level 10/20/30 is okay, halflings can only reach a maximum level of 8 while humans have unlimited advancement is not.
Race-class restrictions: e.g. dwarves cannot be wizards, elves cannot be paladins, etc.
Gender differences, especially if one gender is strictly inferior to another: e.g. female PCs are exactly like male PCs except that they have a maximum cap on Strength.
Level caps, especially if they are not applied across the board: everyone retires at level 10/20/30 is okay, halflings can only reach a maximum level of 8 while humans have unlimited advancement is not.