Just a random thought for people to debate over. What if, when you TR, rather then just getting a size increase to your model, you could pick additional cosmetic options during character creation? Some new hair styles and colors, facial features and beard/mustache styles, maybe even unlock a miscellaneous option that grants tattoos, scars, or something else. With subsequent TR's, you unlock even more options, until all are available.
Some things to think on:
1) Would this be unlocked for the TR character, or for all on the server? I do not think it should be for all servers, either way, but hey.
2) What determines the styles you get? Is it by your Paste Life you gain? (TR from a cleric, you get "Cleric Hair 1 & 2") Is it sequential to TRs? (TR 1 gets you "Hair 1," TR 2 gets you "Hair 2") Do you get to pick 1 or 2 options from a list each time you TR?
3) The miscellaneous suggestion is vague. What do you think would be neat additions for it? Should it even exist?