I like all, but boas and pythons got me pretty good and its still pretty hard to decide but if I break it into a few sets it be easier after.
Emerald Tree Boas - super interesting boa, complicated but yet simple, a true gem in a boa collection for the experienced (for so many reasons), loads of locals and families to choose from.
Green Tree Pythons - everything as Emeralds.
Boa Morphs - everything from anery to salmon, sunglows to snows.
Like I said it be hard, but my favorite is all cause they all have a reason to me, but over all - Moses our Snow Boa.