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[Earthling]

My best handler is a bredli bub. Got her as a month old and tried to tag me when i opended the bag to put her in her cage after the obligatrory AAE flight. A year later and she has never even looked at tagging me since that bag opening incident..
Her sister though took a while to calm down but is pretty good now..a bit skittish but havent been tagged in 3 or 4 months.
Also got a Darwin adult, calm as.....I use me hands to pick up in the cage(same as Bredli yearlings) and no problems apart from a bit skittish at first but settle down quickly.
Best bet perhaps is to pick the breed YOU want and then go out their and find one that is easy to handle from day one. Yearling as mentioned is a good idea, however, if its off a large breeder you will find its probably snappy as of lack of handling apart from cleaning and feeding. Find a guy/gal/it that has bought it when young and as of other circumstances must move it on...you will have more luck in finding a friendly python that way.
After all if you get bitten by the 'herp bug' by the time your first is 6 foot long you will have 6 or more other snakes in your collection to learn from so what they grow to size I feel is irrelevant..