Crossbody, camera bags, with a zip are my favourite. I like odd shapes and unique designs. I'll do a flap over a zip on a camera bag if the design is nice enough, but don't like saddle bags.
I prefer slouch over structure, and all my bags have to be small. Totes overwhelm me and I never carry enough to use them.
I'll do most colours, but not anything in the beige/tan/brown family. It's not for me. I can do only specific shades of pink and red (like crushed raspberry or plum, but nothing too barbie or too brown-leaning like maroon). My favourites are blues!
Leather, not straw, pleather or patent. I'm interested in pineapple leather as an (ethical, sustainable) alternative, but have not done enough research on the environmental impact of production, nor have I been able to handle anything made with it. That's something I hope to explore in the future.
Also, nothing with a loud logo!