John.....Each & every woman has her own individual taste in what she may or may not find attractive in a man.
Personally, a magical smile, contagious laugh and a talent for quick-witted humor is VERY high on my list. The ability to make one another laugh is for me as important as intelligence, character and passion within a relationship.
Seriousness and serenity have their pluses too. It all relates to how when and why. Women KNOW how to gauge and rate these traits to her pleasure or aversions.
I'd have to ask you why you "smile once a decade." Frankly, that's pretty sad~ literally.
If that's a picture of you, you're very handsome. Imagining a smile on that face is the stuff of fantasy dreams for most women, Snap out of it, John.
IMHO, if you looked at me with that same expression, I would look on either side of me, hoping that you were scowling at someone else...not me! OR In fact, I'd probably find a mirror to see if I had chocolate smeared all over my face, running down the front of my shirt.