If this was cheaper and my 50-year-old self had the time or energy to learn it from the ground up, I'd think of all kinds of uses for it - helping my wife track client info for her at home business, building a membership directory for my church, building a personal financial tracking system...but frankly I've got a lot of online streaming TV to watch and learning to build a database is just too far down the list.
For a single-user “personal” database, Tap Forms works great for a fraction of the price.