ok, here are the circumstances:

1. holding steering wheel straight, car goes straight

2. let go of steering wheel, car continues to go perfectly straight

3. light to moderate braking with hands on/off steering wheel car goes straight

4. when i brake hard, even holding the wheel completely straight, the car tends to pull to the right, forcing me to adjust by turning left and im sure making my braking worse. it wont be long before i have to put my all season tires back on and those have terrible traction as it is. i just want to have the best braking conditions possible before i have to put those tires back on.

Mine kinda does the same thing, but i know its not bad brakes.. mines somthing witht he barings ball joints or somthing.

Things to check, check the pads, see if one caliper is braking more then the other. Also try bleeding the brakes, then check tire pressure, then umm.. barings, ball joints and alignment.

sounds like a bad caliper on the left side

i had the same problem, i had a bad back right caliper. it got to the point where my tire would lock up. the caliper was 80 bucks at a local advance. Also if u have a bad strut i'm pretty sure that can also
cause ur problem.

bad back caliper? my drivers front was bad, i was having the same problem like that.. it was stuck

was it under the same circumstances as me? i dont think one of my calipers is stuck, just one is braking harder than the other. i dont know, ill check it out soon.