I want to get a new lizard, so I'm doing some research.

I would like to have a lizard that is somewhat active. One that likes to investigate its surroundings, and once settled in, doesn't run into its hidespot when a human passes near.

I know leopard geckos can be fairly active and calm, but I was considering a fat-tail for something different.

If I were to keep one lizard in a 20-long, under optimal temps, humidity, etc., which would be more active on average: a fat-tail or a leopard?

If you can recommend another variety of desert-type of gecko, please do so.

Thanks.