What's your favourite gear ratio?

New to fixed gear. Started up with a 46/17, as that was stock on the bike, any suggestions for taking it a bit lower? I might have ruined my knees in the last two weeks trying to skid while obviously using the wrong technique... :D
If the suggestions include a new 165mm chainset I'm all for it, since the cranks on that bike are proper shit.

Fit some brakes? The money you save on tyres should pay for it.

Srsly, 42-tooth chainrings are pretty standard and widely available.