Is it me, the tire pump, or all the valves??!?

[OakLeaf]

I pump up my tires every single time I ride.

+1, on the roadie. High pressure tires typically lose 15-20# overnight.

I'm less diligent about the low-pressure tires on the hybrid, but it sure would save me a lot of effort if I aired the tires before it feels like I'm riding through mud...