My faves are MBKs & desert California kings, but there's other good choices too- speckled kings are cool. The milk snakes I've known (Sinaloan & Pueblan) were
more "squirrely" than I prefer (to handle). No experience with grey-banded kings- very pretty but I understand many are hard to get going (feeding) so that
might not be a good choice just yet. Easy but not very common as pets are Prairie Kings. Don't hear many ppl talking about keeping Florida kings these days
either? (& there's several kinds from FL)