The clothes I've bought for myself, especially good suit shirts for formal events and cargo shorts for everyday wear. I'm not big on using scented products in general, but those seem like a fun option for others.
I vote for MAAB people to be included in this conversation. Also, yes, the poll should include "breast forms, bras, [and] restrictive underthings," as Nori said. Gender is a many-layered and marvelous thing. 1. Don't make assumptions about the kind of bodies people have. 2. I see no reason to make this about FAAB people only.
As for me, as an FAAB genderqueer person, I find that binders make me feel great but are too hot, don't make me look completely flat, and are too restricting for long-term use, so I often settle for wearing a really loose shirt or hoodie to hide my figure as best I can. Unfortunately, it does nothing to hide my hips. As a DD cup, I wear bras in public (if no binder) and if it's hot, because skin against skin makes me sweat. I prefer pants over shorts or skirts. I have been known to wear femme-y blouses in formal occasions and T-shirts as casual clothes. As far as accessories, scents, etc: I never wear makeup. I like nail polish. I wear Old Spice deodorant. I have both ears pierced (and would like more piercings). I like some rings and necklaces but occasionally find them distracting, because I play with them. I'm not a fan of purfume or musks.
I couldn't pin it down to just one. Right now, having a binder is very very important to me, but I am having top surgery next month so there won't be a need for that any longer.
At the same time, I would never wear anything but baggy or skater t-shirts, baggy jeans or baggy shorts or pajama pants, so I would also be uncomfortable in say khakis and a button down shirt, but as long as I were still read as male that would be fine compared with being unbound right now.
Even if I look especially femmy that day for whatever reason, a binder makes me feel better. I'm way more self conscious about my chest and hips than most anything else. A lower voice would really make me feel better, but that will come soon since I'm on T again.
I definitely cannot go out without binding, but another thing that helps me feel more masculine are cute undies, haha. I prefer boxer briefs in fun designs; they are much more "me" than baggy boxers or boring briefs.
I was fortunate enough to be born very flat chested (32AA), so I don't really need to bind if I want to pass or appear androgynous. Unless I'm wearing a thin or tight t-shirt there's not much to be seen. So a couple layers on top and some mens (or more often boys because I'm too scrawny for words) pants are usually enough.