Interesting thing is in a C172 the right wing is actually at a slightly higher AoA than the left due to the fuel return, the fuel return on goes to the right. Also increasing the weight of that wing. This causes the wing drop, normally seen to the right. Mind you the margins for these differences is very small. Cross wind in the air is also a cause as it changes the relative airflow over the wing as the plane is a relativity slow speed.