Li Shenron
Legend
All of them!
I think the typical D&D Barbarian character has too many concepts embedded in it to make it only a theme or background... for instance IMHO a Barbarian shouldn't by default be as proficient with armors and shields (maybe weapons too) as Fighter but it should be physically more robust and quick/agile due to a life in harsh environments. Something less and something more then, and you can't use the current mechanics of themes to represent this adequately IMHO. Furthermore, if a "theme" defines how you do things rather than who you are, Barbarian doesn't sound like a theme at all. Hence there should probably be a Barbarian class.
OTOH not everyone living in a nomadic/barbaric tribe should automatically be a Barbarian in the class sense, because that is for their warriors only. Thus a "barbarian theme" is perfect for survival-type and wilderness knowledge skills, plus perhaps some special abilities to improve resistance vs weather and environmental hazards.
And then there can be a Berserker theme... in fact "rage" may not even be a Barbarian class features at all. If it will be, then also picking the Berserker theme may improve you at that, but it would make sense that non-Barbarians can also learn to rage, e.g. gladiators in civilized lands, special troops in an army, ruthless street rogues, and crazed cultists and sorcerers?
I think the typical D&D Barbarian character has too many concepts embedded in it to make it only a theme or background... for instance IMHO a Barbarian shouldn't by default be as proficient with armors and shields (maybe weapons too) as Fighter but it should be physically more robust and quick/agile due to a life in harsh environments. Something less and something more then, and you can't use the current mechanics of themes to represent this adequately IMHO. Furthermore, if a "theme" defines how you do things rather than who you are, Barbarian doesn't sound like a theme at all. Hence there should probably be a Barbarian class.
OTOH not everyone living in a nomadic/barbaric tribe should automatically be a Barbarian in the class sense, because that is for their warriors only. Thus a "barbarian theme" is perfect for survival-type and wilderness knowledge skills, plus perhaps some special abilities to improve resistance vs weather and environmental hazards.
And then there can be a Berserker theme... in fact "rage" may not even be a Barbarian class features at all. If it will be, then also picking the Berserker theme may improve you at that, but it would make sense that non-Barbarians can also learn to rage, e.g. gladiators in civilized lands, special troops in an army, ruthless street rogues, and crazed cultists and sorcerers?