The main reason why Jesus has not returned for His people in the rapture, is that HE wants more to get saved. HE is a patient God, a loving God, a caring God.
2Pe 3:9  The Lord is not slack concerning his promise, as some men count slackness; but is longsuffering to us-ward, not willing that any should perish, but that all should come to repentance. 
Jesus wants my lost brother and sister to get saved, so HE waits.