You haven't toyed with the tissue stylings? I managed to figure them out working on a project of my own, and I'm gonna offer up some suggestions for the human civs. Make them more distinctive, rather than the "let your hair grow wild, shave everything else" thing that humans have by default. Stick them at the end of the civ's entity definition and watch them work. Purely aesthetic, but its the little things that count.
By default, humans keep their facial hair shaved, and allow their hair to grow indefinitely.
[TISSUE_STYLE:HAIR]
[TS_MAINTAIN_LENGTH:25:75]
[TS_PREFERRED_SHAPING:STANDARD_HAIR_SHAPINGS]
[TISSUE_STYLE:MOUSTACHE]
[TS_MAINTAIN_LENGTH:NONE:50]
[TS_PREFERRED_SHAPING:STANDARD_MOUSTACHE_SHAPINGS]
[TISSUE_STYLE:BEARD]
[TS_MAINTAIN_LENGTH:NONE:50]
[TS_PREFERRED_SHAPING:STANDARD_BEARD_SHAPINGS]
This will result in Wesman men occasionally growing beards and mustaches; they won't do anything fancy with them, and the longest they'll grow them to is below the dwarvern minimum. Both genders will also keep their hair short and combed.
[TISSUE_STYLE:HAIR]
[TS_MAINTAIN_LENGTH:50:NONE]
[TS_PREFERRED_SHAPING:STANDARD_HAIR_SHAPINGS]
[TISSUE_STYLE:SIDEBURNS]
[TS_PREFERRED_SHAPING:STANDARD_SIDEBURNS_SHAPINGS]
[TISSUE_STYLE:MOUSTACHE]
[TS_PREFERRED_SHAPING:STANDARD_MOUSTACHE_SHAPINGS]
[TISSUE_STYLE:BEARD]
[TS_MAINTAIN_LENGTH:50:NONE]
[TS_PREFERRED_SHAPING:STANDARD_BEARD_SHAPINGS]
Very close to the Dwarvern style. Nord men will keep their beards at least medium length, and style them, their sideburns, and their mustaches should they choose to grow them. Nords will not, however, shave their heads as dwarves sometimes do.
[TISSUE_STYLE:HAIR]
[TS_MAINTAIN_LENGTH:35:200]
[TS_PREFERRED_SHAPING:STANDARD_HAIR_SHAPINGS]
[TISSUE_STYLE:MOUSTACHE]
[TS_PREFERRED_SHAPING:STANDARD_MOUSTACHE_SHAPINGS]
[TISSUE_STYLE:BEARD]
[TS_MAINTAIN_LENGTH:NONE:50]
[TS_PREFERRED_SHAPING:STANDARD_BEARD_SHAPINGS]
The Osmans will refrain from shaving their hair, and are willing to grow it pretty long. The men will sometimes grow short beards and mustaches of any length (think long Fu Manchus).
It's really rather simple, although I've not experimented much. [TISSUE_STYLE:(body part)] determines what is being modified, [TS_PREFERRED_SHAPING:(shaping types)] sets possible shapings (read: styles), and [TS_MAINTAIN_LENGTH:x:y] requires that entity members
keep the defined part's length between X and Y, as per individual preference.
You can do the same for other entities, although I should point out that elves and goblins are physically incapable of styling their hair without some raw editting:
For hair styling, change
[SET_TL_GROUP:BY_CATEGORY:HEAD:HAIR]
to
[SET_TL_GROUP:BY_CATEGORY:HEAD:HAIR]
[TISSUE_STYLE_UNIT:HAIR:STANDARD_HAIR_SHAPINGS]
[TSU_NOUN:hair:SINGULAR]
You can do the same sort of thing for mustaches, beards and sideburns, by making the obvious changes to the above. Elves and goblins are, by the way, incapable of growing beards at all; you'd have to add that capacity from scratch. Note that without the above changes, I'm pretty sure conquered elves and goblins will not adopt the styles of their conquerors; a Dwarf under Wesman rule would keep his hair short, but an elf would not.
Anyways, now that I'm done showing off the shiny things I've figured out, I'd just like to say, keep up the good work!