Also remember that PADI is only suggesting you not dive at night and go deeper than 60 feet. You are now licenced to do both with just your OW cert. I have many many buddies who do both night and deep on just an OW cert. But from a comfort level I highly recommend them. All of the specialty dives you can choose from in the AOW program will give you proper supervision to cover those "what if" scenarios and give you more comfort to try them. It’s good that you question the issue because it shows that you have a healthy respect for diving. Night is a good one because, trust me, there will be days you are diving on a cloudy day under a dense kelp canopy and it seems like night. And before long you will not notice the difference between 30 feet and 130 feet......it’s just part of the same dive :-)