Once I learned that porous materials can harbor bacteria, I essentially stopped using them altogether for penetrative play. I am very prone to UTIs and yeast infections, so for me it was the smartest choice.
Beyond that, the more I try toys and learn what I like, I think I actually become more adventurous. Knowing what I like and don't like makes me better able to look through a ton of diverse items - including styles and designs I've never tried - and be able to effectively guess at which things I won't like right off the bat. In other words, I am actually more
willing to try new things now that I trust my judgment regarding my preferences. I'm more willing to take a risk on something wild because I am able to narrow down the risk of a bad experience by eliminating textures, designs and sizes that I know won't agree with me.
As far as materials, I'm not selective as long as they're non-porous and free of compounds that can harm the body. I'm open to just about anything.