Maybe it's just me, but there's some anxiety involved in deciding to call myself something I want to be but don't know if I've really achieved that level of seriousness to declare it.
Like "runner" for example. Does running barefoot 3 to 5 miles a week actually make me a runner? 'Cause I know a few "runners," and they're quite a bit more intense than that.
I used to fear socks -- all those tiny needles, tiny yarn, and having to do it all over again before there's a useful pair of matching socks to wear. I might even say I'm overdue in declaring this, but when you realize you've finished 4 pairs of socks in one month, and your sock yarn stash is growing faster than you can knit it but it's not because you don't knit a piece of sock every day, you learn something about yourself -- I am a sock knitter!
I bought a teeny tiny sock blocker key chain a few weeks ago. It started out as a cute little thingy to knit socks for and use up scraps from person-socks, but now I think of it as a symbol of my membership in a club I never thought I'd be a part of.
(And for the time being, I'm not quite ready to call myself a "runner.")