[quote=dach95]I'm finding that when I do a cold start, sometimes I can't shift out of park.

The thumb is locked and won't go in while the brakes are applied.QUOTE]
Do this...EVERYTIME you get out of the car (yes, the order is important):
1. Come to a stop.
2. Apply parking brake fully (obviously keeping your foot on the brakes).
3. Shift into park.
4. Turn off the car.
From your post, it sounds like you are experiencing torque lock. Typically it happens when you are parked on an incline, but I used to have a Grand Am that would do it a lot, even it it was sitting level. Not to mention, it really is better on your car if you use your brakes to keep your car from moving. Brakes are pretty cheap and easy to replace as opposed to a tranny.
It could be other things, but 9 times out of 10 that will fix the problem.