Polyamory isn’t a sexuality. It’s a dating preference. Most of these labels do apply to me, and I think they’re redundant.

Yes it does. Read the bisexual manifesto.

Pansexual, polysexual, and omnisexual are all microlabels and are all subsets of bisexual. You don’t need more labels than gay, straight, and bi.

Edit: I forgot about asexuals. But I specifically only care about bi subsets. They’re dumb, and you only need bi