Observations on socks

[Quiara]

I'm knitting a pair of socks for a friend who's had a series of several bad days. She's a knitter, so I know they'll be appreciated -- especially since she hasn't tackled socks yet, thinking they're "too hard." (I'm trying to convince her otherwise.)

Anyhow, I'm knitting one at a time w/my 40" US2 Addi Turbo and somehow, a size 2 just seems kind of "big" for this yarn (Regia jacquard), though I'm not a loose knitter or anything. But I've learned through this particular sock -- despite having knit tons of socks before and never feeling this way -- that I would enjoy making them on size 0 or smaller. This amazed me because I've never thought of myself as someone who would appreciate doing things at a very fine gauge; I love instant gratification. But it just seems like socks would be satisfying on very small needles. What's next? Lace? Seems like my entire knitting worldview is changing just because of one pair of socks.

Wanted to ramble about this a bit and this just seemed the place. What size do you use for your socks?