“I find flaws attractive. I find scars attractive.”

A couple of things-intelligence, self-esteem; I like men who are sure of themselves and not just weathercocks and most importantly, integrity. Common sense and humour also help.
Personal Quotes

Section 181
The Passionate State Of Mind, and Other Aphorisms (1955)
Context: There are many who find a good alibi far more attractive than an achievement. For an achievement does not settle anything permanently. We still have to prove our worth anew each day: we have to prove that we are as good today as we were yesterday. But when we have a valid alibi for not achieving anything we are fixed, so to speak, for life. Moreover, when we have an alibi for not writing a book, painting a picture, and so on, we have an alibi for not writing the greatest book and not painting the greatest picture. Small wonder that the effort expended and the punishment endured in obtaining a good alibi often exceed the effort and grief requisite for the attainment of a most marked achievement.

De l'Art de persuader ["On the Art of Persuasion"], written 1658; published posthumously.
Source: De l'art de persuader

Brown : The Last Discovery of America (2003)

As quoted in Plans, Sections and Elevations : Key Buildings of the Twentieth Century (2004) by Richard Weston
Variant translations:
It is not the right angle that attracts me,
Nor the hard, inflexible straight line, man-made.
What attracts me are free and sensual curves.
The curves in my country’s mountains,
In the sinuous flow of its rivers,
In the beloved woman’s body.
As quoted in "Architect of Optimism" http://www.ft.com/cms/s/0/db740a7a-e897-11db-b2c3-000b5df10621.html?nclick_check=1, Angel Gurria-Quintana, Financial Times (2007-04-13)
It is not the right angle that attracts me.
nor the straight line, tough, inflexible,
created by man.
what attracts me is the free, sensual curve.
the curve I find in the mountains of my country,
in the sinuous course of its rivers,
in the waves of the sea,
in the clouds of the sky,
in the body of the favourite woman.
Of curves is made all the universe.
As quoted on a Photo page on the Museum of Contemporary Art over Baia da Guanabara http://app.tabblo.com/studio/stories/view/122423/?nextnav=favs&navuser=1

Source: The Lightning Thief