Hat style

[bobman0330]

I've always been fascinated by hats, but I was born fifty years too late. But I recently decided [censored] convention, I'm getting a hat. I'll either have a daring personal style, or I'll be that weird guy with a hat. Whatever. I have some style questions, though, and none of my usual sources is helpful.

-Colorwise, what should a hat match? Do I need a different hat for every suit, or is there such a thing as an all-purpose hat?
-Hat + trenchcoat seems like a classic and functional pairing, and that's where I'm going to start. What about hat + suit? Are there hat options that work with more casual clothes?
-Hat types. There seem to be a virtually endless array of fedoras and porkpies and god knows what else. Should I be guided just by what looks good, or are there rules about hat types that need to be observed.

Any other hat comments, links to hat websites, or other bits of haberdashical lore would be welcome. TIA.

(BTW, I'm white. I'm very aware that there's a yawning racial divide on the issue of hats. Let's do our bit to promote racial equality by bringing back the white hat.)