You're right there is more to sucking than deep throat. And yes I deep throat, I like a cock that is long enough to gag me, but not so much that it hurts. I think 7" is plenty. Actually once some stud has his hand at the back of my and fucking my brains out it doesn't matter anyway. The trick is not to pass out after it's buried.

You could switch to '? inches', '? inches', '? inches', or maybe even '? inches', and maybe you would not gag?

If not, I would be interested in helping you with your "gag reflex" (and getting beyond '4'?).