I started out nearly 10 years ago with an Arizona Mountain Kingsnake, and honestly still love my smol boi Ammon (he is within the average range of size for an adult male though slightly on the larger side, a staggering 2’6" and 110 grams). I got really lucky with him as I had seen them online but the minimum price was always $250 and I couldn’t afford that at the time (I was 13) nor could I order online anyway. I went to a local pet store and found a little baby for $100. They had just priced him down from $300 because no one had bought him or even really looked at him in a month because he was “too expensive” and they needed him gone so they could get new animals in. He is a beautiful boy, just a very tiny species. Here is my best pic of him since he never stays still.
I do however have to say my favorite species overall is the Eastern rat snake. Their personalities are wonderful and they are extremely inquisitive. My girl is like a lizard with how she comes to investigate what I am doing by her cage. They also get nice and big compared to many rat snakes. I have seen wild ones that were at least 7 feet, but they average around 5-6 feet.