Your pictures look good. If you want to advance "your look", take a look at
www.portranet.com. It may seem expensive but it takes you to whole new levels. I recognize some of your sets so I can tell you are serious about what you are doing.
On a side note, I am in Hialeah, I find it super interesting that you are doing so much Sr High portraits. I was told many times the spanish decent people didn't find Hig School portraits to be a big deal and I was advised it wasn't much of a market. You seem to be showing a different story.
Regards,
~Peter