In core D&D I'd probably be Expert, 1st level just like almost everyone else (if you're honest & look at the DMG level distributions!).
In Traveller20 though, I'd be roughly Academic 5/Army 1, which sounds a lot better.
To detail:
Age: 30, 11 years in Higher Education including undergrad (3 yrs), PhD (5 yrs - ouch) & 3 years in research/teaching post, also 2 years in Army Reserve (yes the Army level is a highly marginal one - maybe just a Weapon Proficiency in Assault Rifle & some related skills in forced marching, rifle maintenance, etc). This would be a pretty typical Traveller20 starting PC.
High Int, currently Con low due to chronic back pain - it feeds through into other stuff like lowered immune system also, sadly

Str varies from medium-high (while in Army Reserve) to medium-low (now), Wis was rather low but age has helped a bit, Dex lowish (twisted right leg, explains why I was so bad at soccer/football as a child, never knew that until recently), Cha seems variable so I'll say average. Currently (with +1 Int for all that PhDing when I hit 4th level):
Str 9 (was ca 12-13) Dex 8 (was 10) Con 8 (was 12-14) Int 17 (was 16) Wis 10 (was 8) Cha 11 (was 8).
Edit: oh yeah, I have the Iron Will feat.

I could claim to have Int 19 since my starting Int would've been in top 0.5% of general population, but that depends on whether you assume the 3d6 bell curve applies to the general population or not, so that .5% of people have 18 in any particular stat.