Kingsnakes are generally a little jumpy when they are small, but with some handling they normally calm down and make beautiful display animals and wonderful adult specimens to keep. Milksnakes are also a little "quick" (not as much so as kingsnakes) and also with time make great animals.
Nothing against California kings, but my friend had some that he bred and they were very snappy, so unless you handle them alot they are somewhat aggressive.
My leucistic ratsnake is my first rat, and it has been a little nippy but nothing overly defensive. In general she is just fine when I get her out, but on occasion (on a bad day or when she's hungry) she will bite me. Thankfully she's only 15'' long, so it doesn't hurt more than a couple needles poking my skin.
Corns in my opinion are the best "first snake", but with a little research and patience you can own virtually any snake (non-venomous) and have success. My suggestions are to stay under 5' for the first one and in the colubrid family, but a few boas and pythons are fine also.
Also, never handle another reptile then a kingsnake, because they will bite on just the smell of food even though the texture and heat signature are not right. It is also a good idea to wash your hands between handling snakes, for the reason above and not spreading diseases and parasites.
Just do your research and you will do fine
Good luck
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Sean McIntyre
Currently have:
0.1 Antherystic Elaphe Guttata Guttata - Corn Snake
1.0 Elaphe Vulpina Gloydi - Eastern Fox Snake
0.1 Leucistic Elaphe Obsoleta Linheimeri - Texas Ratsnake
1.1 Morelia Spilota Cheyni - Jungle Carpet Python
Saving for:
Agkistrodon Contortix Mokasen - Northern Copperhead
Epicrates Cenchria Cenchria - Brazilian Rainbow Boa