Tx for the private msg, CPTMTD. I do concur that the twr do get flustered once in a while. Never waited as long as you, but sometimes on approach you have to call them multiple times (even when there is no obvious traffic) before they acknowledge. They also got very frustrated with a helicopter the other day - couldn't make their mind up where he should hover to! Somewhat entertaining, if a little annoying waiting for a gap in the ensuing conversation.
Nice airport for training though, on the whole. The two runways give options for rh and lh circuits and only one has lighting at night.... Give 'em another chance!