Yup
I too share - THE FACE - the eternal scowl - I was once asked 8 times in one day by the girl next door What Wrong? My reply of nothing this is how I always look, just didn't cut it...
(Lukekull Fuck, Sat 3 May 2008, 21:12, 2 replies)

my reply is
"Im always happy, its just my face that is miserable"
(Halfy By light alone, Sat 3 May 2008, 21:15, closed)

I'm not alone!!!!
I too have the face. It gets even worse if I'm engrossed in something, apparently I look furious. It's worse as I'm visibly pregnant at the moment, which gives people the right to ask you how are you and about intimate details of your physiology any time they want. I might have to post this as my own answer.
(Cryptoprocta has abandoned the username of Voodoo Mary, Sat 3 May 2008, 22:55, closed)