Each squadron has their own belief on many things.
Some squads may have rules concerning Dogfight.
Other squads may discourage spawn killing.
Also, there are new and old squads.
The new squads, such as the waterbenders, are trying to recruit people desperately, so the new squad would have lower expectations of skill from their member.
Old squads, such as M.O.M. has higher expectations for their member.
These are some things to think about, but always remember that if you do not like the squad you have joined, you can leave the squad. Make sure you say something on the squad thread to avoid confusion.
PS.
Be active on the squad threads to earn some brownie points.