Orange = Considered for release. Either I do not use these pets very much or I have duplicates from the same families.
Red = Very likely to be released.
Black = Undecided.
My biggest 'want' at the moment are definitely the new tiger models. Hydras being on the shared #1 spot. The rest I listed are more or less "I will try these out and see how they feel" but won't get too upset on giving up if they are not tameable or get replaced with something more interesting that is discovered later on.
About my current stable then: I never thought I'd say this... But my beloved Halcyon (the white saber) might get replaced by a new white tiger model. Though, this is something I will only do if I have to and can't find any other way around. At the moment I have a huge amount of cats in my stable and at least Sambas is going to go. The only reason I still haven't released him is the fact that he took so long to find. (I haven't even given him a name and he barely leaves my stable.) Maybe I can find some space to keep my dear Halcyon and still introduce yet another cat into my stable.
You might notice the amount of spirit beasts I have. *sigh* They're just so beautiful and fit my hunter very well. I've fought with stable space a lot before because I have too many spirit beasts and I will have to skim them down eventually. Either Ankha or Magria will probably be released eventually and currently I'm leaning more towards Magria. Ban'thalos and Olm are, in my mind, rather similar in personality so eventually either one might get released. Currently leaning more towards Banny because he is a spirit beast which, yet again, I have just too many of.
As much as I love warp stalkers, I have to consider releasing my Gezzarak due to already having a white warp stalker in my top 5. I'm too fond of the white one as I've had him since BC and it was the first I ever wanted. Gezzarak is in the top 5 of my alt hunter though, so I wouldn't feel too bad about it.