I was pretty psyched about collections until I discovered:
1. It only applies to cartel market items (AND NOT MY SPACE PANTS – unless there’s a whole screen I missed, but I doubt it)
2. It only applies to full sets (except for some separate items, like invisible gloves)
I have 5 level 50+ toons. All of them are wearing cartel gear. None of them is wearing a complete set. For all my collecting I have exactly ONE set unlocked (and that’s just because I bound the handmaiden boots before I realized they sucked eggs). Sometimes I do have a complete set, bound, but across multiple characters. In most cases, parts of the set (not just the hat) were gross and I refused to buy them.
My gunslinger is currently wearing the classic despot’s chest, which I might want my bounty hunter to wear at some point. However, I’d have to buy the entire rest of the set to unlock it. And by the time I did that, I’d probably be better off just buying another copy of the classic despot chest (even overpriced) and mailing it to my bounty hunter.
I can see collections being awesome for someone who purchases a full set and wants to crank out copies of that entire set. But for me, it is a practically useless feature. I wonder how other people are using (or not-using) the collections feature.