So I've got a dilemma. I'm planning to build a wheelset with a fixed rear hub. I already have a heap of 15 gauge spokes that would work for 3x or 3-leading/3-trailing lacing. But I think I'm in love with the idea of crow's foot lacing -- it's supposedly quite strong, and damn it looks nice. For the crow's foot lacing, I'd mostly be able to use the spokes I have, but would need to buy a few shorter spokes (unequal spoke lengths in that pattern).
Here's the point of all this: are 15 gauge spokes a bad idea? And are any of these lacing patterns a particularly good/bad idea, esp for the rear wheel where there's more stress? These wheels are for a commuter bike, and I'm only ~125 lb. If I need to suck it up and buy all 14 gauge or even butted spokes to make a decent wheel, I'll do so. But I like the whole idea of using what's available and free.
In case these lacing patterns aren't familiar: