Asian here
Geologically: Asian people reside in.... well Asia!
Genetically: there are several linkages in history of course not to mention ramapethicus and the older homosapiens. Major population has fair skin with darker delineations as we move closer to the equator of course(more sun means more melanin requirements for survival). The shape of the eyes also varies with geography and inheritance. Mostly the ones living towards the northern central areas have slanted (monglian) eyes with double eye lids as a result of evolution(adaptation to cold environment). Generally size of eyes and ears increase as we move towards the equator (another adaptation to counter heat). Body structure and heights generally increase South wards but are also effected by economical development of the individual's providers for proper and healthy growth. Most people posses black hair and brown eyes(the Iris is rarely black).
Personality: Generally like any other human on the planet. With an additional flair of peculiar discipline observed amongst plenty.(Please don't kill me for this please!)
Languages: Many to speak of!!
Well personally: Black wavy hair, brown eyes, 45kgs, 166cm, Total Nerd as you can see with a hint of artistic tendencies.
Messages
by the phrasing of this question I get the feeling OP wanted an answer like this lmaoo
Wow(⌒▽⌒)
I like ur way of description
Sounds really like any national geography channel with exact reasons.( I'm not being sarcastic here ok)
Are u a science student? as you're describing adaptation.
And most asians have black hairs me too, long black hair upto hip length.