I think you'd be fine with most standard breeds since you don't have extreme cold or heat (compared with NE or SW temps). Buff Orpingtons tend to be sweet and tame and good with kids. We've also success with Black Australorps, Black Sex-links (a cross between a Barred Rock and Rhode Island Red, I believe), Rhode Island Reds, Barred Rocks (also very tame, and so pretty!), Easter Eggers, and various Red Sex-links (ISAs, Cinnamon Queens, and other various names depending on the breeds crossed--ours were luck of the draw from the feed store so we didn't know specifically which they were), and Salmon Faverolles. Leghorns tend to be more skittish but do lay very well.