Hog Nose snakes are not boas. They are a colubrid species (like a corn snake) that stay quite small - males average only 1-2 feet and up to about 150grams or so and females can get up to 35" and up about to 250grams. 2 feet is the average length. They are, however, very interesting snakes and do make excellent pets! Many folks here adore their hoggies.

Dumeril boas make excellent first-time beginner boas. Their care is quite straight forward and they are extremely docile and gentle snakes and do not generally have feeding issues. They may be a bit heftier, but they are so gentle, its relatively easy to unwind them.

A columbian BCI is an awesome animal and not boring in the slightest. My 2 BCIs are totally interactive, curious, and love to be handled. But even the smaller males are every bit as strong as a Dumerils - if not stronger. Overall, they are a larger snake than a Dum. But their personalities are so great, I wouldn't give them up for anything!

Rainbow boas are also good - they are not really any more difficult to care for than any other boa. They do require a slightly higher humidity, but that is easy enough to address. And they can be nippy as babies, but so can so many other species and regular considerate handling should take care of that. And they do not tend to be as strong as a BCI or Dumerils. They are a lighter bodied snake as they are more arboreal in nature.

You've been given a few suggestions and, frankly, I don't think you'd go wrong with any of them. That's the beauty of having all these great species available to us - the choices are endless!