You should consider a bearded dragon. Beardies are very durable, don't get too big, and have great personalities, which make them a good species for just about anyone. Beardies are docile, but also curious and attentive like a puppy, most like being handled (at least they don't seem to mind), and when my beardie gets cold he likes to snuggle. They're diet is made up of lots of crickets and veggies, they need a UV light and heat lamp and a big tank.
Whichever species you get, make sure you do a lot of research. Also, keep in mind that keeping a lizard pet healthy can end up being pretty expensive.