I quite like house snakes too, I saw some green ones at doncaster show. Do you want a snake that will sit still like a royal python or one thats quite active like a milk?
Also do you want one that comes out in the day or at night? Do you mind if it likes to burrow or do you want one that climbs etc?
Some snakes can be hissy but just bluff some can be unpredictable and might bite now and then and make things exciting for you lol. Others you probably wont even be able to make it bite you. Which ones do you like the look of ie colubrids or boids etc?
Do you want something common or something a bit different?