First thought would be is that your juice is a high VG content, and low PG content, since PG is the flavor carrier in eliquids. Also, if you're getting really good clouds, it's probably high VG.
But...without knowing the PG/VG ratio and nic level the juice is, what the juice brand is or if it's in-house made by the shop, if they gave you a "flavor shot" in it or not, what type of tank and coils you're using, etc....hard to tell what's causing the lack of flavor for you. Could be several different things or only 1 maybe.