I voted "Other". "Restricting myself." is too vague. And "Man law" is just dumb. Any set of rules exclusively followed by men will inevitably have some stipulation in it that totally sucks. Like that rule in the "Bro Code" that says you can't sleep with the girl your friend used to date? Screw that. I'll sleep with any girl so long as she's cute, doesn't have an STD, lets me use a condom, and has never accused an innocent man of rape before and never will.
The values that define "manliness" are the kind of values that everybody should ideally have, man or woman. Not being a whiny wuss. Facing your fears. Standing up for yourself. Being honest. Taking responsibility for your actions. Honor. Doing what you want with your life. Because it's "manly", this implies that those who don't do these things are womanly, because that is the opposite. And that's sexist. In these ways, even women should ideally be "manly". But "Women should be manly." is a really weird thing to say. So I say, let's remove these traits from the spectrum of "manly", and just refer to them as "good" traits.
So when we remove these values from the spectrum of manliness, we're left with only one kind of thing that defines manliness: Common masculine behavior. Either because society has taught us to behave that way, or because nature has ingrained it in us to behave that way. It's impossible to list everything considered manly, so I'll just go with some examples.
So first there's common masculine behavior that is equally as awesome when women behave the same way: Fishing. Hunting. Playing video games (now becoming an increasingly gender-neutral thing, but shooters are still dominated by men). Not liking jewelry. Being easy. Playing sports. Chugging contests. Working out. Not wearing a bra under a shirt.
Then there's masculine behavior that isn't awesome when women do it: Farting. Burping. Wearing boxers. Not shaving legs. Picking on the nerds. Eating contests. Building ripped muscles. Never wearing short skirts. Preferring dogs over cats. Being unemotional.
Of course, these two categories are just my personal opinion. And most of the things in the second one aren't cool when anybody does it. Man or woman. But the things within both categories are all examples of masculine behavior. And I think "manly" should be defined exclusively by masculine behavior, because using anything else to define it is either sexist or silly. Based on this, I do consider myself generally "manly". I do most of the things in the former category, and about half of the things in the latter. But I honestly couldn't care less. As long as "manliness" doesn't encompass decent values, I see no reason to place importance in being manly. I do have behavior traits that are totally unmanly. Like preferring cats. Or crying over things. Or watching shows aimed at a female viewerbase. (Friendship totally is Magic.) But I like doing those things, so screw it. I treat "manly" as an adjective, rather than something to strive for. It's not. It's just a word I'd use to describe a person who partakes in a lot of behavior that is typically associated with men.