My SIL babysits for $10 an hour. There's a couple of families for whom she is the firm favourite babysitter, because the kids just adore her. The children she looks after are friends of the family, so she already had a relationship with them before babysitting them, which really helps. Ideally, I think you want someone who knows you and your kids, someone willing to respect the way you choose to discipline/entertain/feed you children, someone you can really trust, and preferrably someone with their own transport (but then do you have to pay them more for that?). Personally, I'd only use a female babysitter, unless it was a family member looking after her. But even then, Ella has a lot of uncles and a few aunts, and there's still only one of the bunch who can look after her - I wouldn't consider the others!