I thought I leaned heavily towards all solid colours, but answering this question has me rethinking my position. Certain prints are VERY me, and they tend to be worn most in certain seasons.
Stripes -- especially in summer. Breton stripes in tops of all weights and sleeve lengths, as well as 2 skirts and numerous bags. Narrower vertical stripes (shirts, short dresses, pants).
Tartans and checks (including houndstooth and glen check) -- year round, but especially in fall.
Polka dots (almost always navy and white) mostly come out in spring.
Also a few florals, mostly the kind with dark background. Following the seasonal distribution, they show up most in winter, when the festive season and the concert season provide more opportunities for dressing up/ leaning the more romantic, even baroque, aspect of my Gentlewoman persona.
Fun thread, Carla, thanks for starting it!