There's lots of diversity here! I'm glad I'm not the only one who deboxes my ponies!
I'll give a more detailed answer myself as I didn't say much in my original post
I'm a collector of all generations. I aim to have one of every single pony at some point, which is unlikely, but I will try to get as many as I can. I'm not too fussed about variants, so I don't buy every re-release of a pony. But if I do end up with a variant of a pony I keep it.
I started out collecting G4, and I'm now trying to complete my G4 collection. I'm about 5 ponies off having at least one variant of every pony released (excluding blind bags, although I do have the full Wave 3 set). I originally intended to buy the mane 6 only, but then I enjoyed buying them so much that I started to buy other G4's they had out at the time (Blossomforth, Dewdrop Dazzle, Lulu Luck and Sugarcup). But when I'd bought all of them I started to get the collecting bug and there was nothing else really to collect, which is why I began to collect other generations too. My first G3 was Petal Blossom, I found her in a charity shop by chance. My first G1 was Moonstone, and my first G2 was Princess Crystal.
I'm not too fussed about playsets and accessories, but when I do get hold of them (usually as part of a bundle) I either keep them somewhere in the cupboard or give them to my younger sister who's 5. She also gets all my duplicates
I will literally collect any pony I can get hold of, as long as it's legitimate, AKA not a Fakie. I love the Summer for this, because you can find so many ponies at carboot sales. However there are of course ponies I want more than others, which I buy specifically online.
I am seriously running out of display room for all my ponies and I'm starting to worry about when I get more because I will literally have nowhere to put them unless I pile them on top of the others. But I'll still buy more anyway. 'Cause I have no sense xD
As for condition, if I ever see a pony that I don't have, I will get it, regardless of it's condition. It would have to be in absolutely terrible shape for me to not get it. However I am always on the look out for better condition versions of that pony!