Hey everyone, can someone give me some tips on how to play Dr. Compressor?

I listen for the attack and sustain mostly on the transients. Usually the sample where the attack is rounder and shorter its the sample without compression (or at least less compression). And when the transients sustain are longest it is the most compressed version (and vice versa).

But sometimes it seems like this is flipped. Is that because some samples get compressed with a slower attack or faster release? If so, what other characteristics should i listen for?

Thanks in advance for anyone trying to help out!