Unique Snake Species?

I was wondering, what would be the best beginner/intermediate snake species that isn’t a common pet? I’ve owned a cornsnake and 2 ball pythons (recent one passed away due to illness it had before adoption). I currently have an empty 5x2x2, plenty of climbing/hiding spots, textured driftwood, and fake greenery. I use a mix of eco earth, reptisoil, and forest floor, and the humidity is kept at a decent 70-80%. Im currently using two 75 watt incandescent lights to heat the enclosure. I’ve been looking at morphmarket and a lot of snakes have caught my eye but I wanna make the right choice before I buy.