And I am biased toward GTPs! LoL...
Of all three of these species that I've handled, the GTPs were the most docile and most interesting and interactive. They are not demanding in husbandry and they are active and curious snakes. They do fine with respectful handling and make fantastic display animals!
From my experience and from all I've researched (because it was not long ago that I was in your position), I have found ETBs to be veeerry touchy with husbandry. And even if you have everything absolutely spot-on, they have still been known to simply die for no apparent reason. Of course, there are always exceptions to the rules and many ATBs and ETBs can be both docile and/or hardy. But generalizations are all we have to go on during our research....
As far as eye candy, here is my own GTP, Hunter. He is an PNG x OSHY and was originally bred by finegtps.com and I purchased him from Rocky Gravley from www.thearborealenthusiast.com. I would recommend Rocky in a heartbeat! He is wonderful to work with and was very informative and considerate and kept in great contact with me. His snakes are great!
And this is my all-time favorite GTP - one day when I have bookoo bucks to spend, I'll have one like him...
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