Garter snakes... They are so hyperactive and dynamic.
They are diurnal so they are awake when we are, they swim and climb when provided with branches and big water bowls, and you can house more than one in the same tank as long as you separate them at feedings. (they will fight over food, all reptiles do)
And the colours, where else you going to get a blue snake?
Turquoise, black and crimson red...
Fire engine red..
and my favourite..
Albino...