What a loaded question!!!
They speak to me. The kits that I buy without question, they just speak to me. I can't explain it. Maybe this is how a shoe shopper or a purse shopper feels; I don't know. I can look through a new release and if there's that one kit that stands out, catches my attention, I'll either add it to my wishlist for when money is available, or buy it right away!!
Now when I'm not being "spoken" to by products, I'll go through each new release/collection and ask myself
-can I make this?
-do I really need this?
-do I have any photos, off the top of my head, that I'd use with this?
-does it have a lot of elements that I'd use?
-do I like the ct layouts or are they using the same elements over and over?
-am I getting my money's worth with this purchase? (I'm not going to spend $10 on 20 elements or something crazy)
-would I use this product more than once?
-do I know this designer and their quality? (if not, I'll try to find a freebie before I buy)
-do I already own said product (I've been known to buy the same product three, four, five, etc times!)
-do any of my designers have a similar product (this is the case around the holidays--I don't need 50 Christmas kits).
-will I use this product right away or will it sit on my harddrive, being forgotten?
I'm sure there are more things that factor in to my purchases, but those are just a few things that run through my head before I buy a product. I'm very thrifty with my money and most times, I get caught up on "do I really need this" and that's when it gets added to my wishlist. If its something that I keep going back to, then I add it to my favorites in my internet's toolbar so when iNSD or some crazy sale comes around, I revisit the product asking myself the same questions. I've had things in my favorites for years now and every huge sale that comes around, I still get caught up answering my questions.
Maybe I overthink too much, but what I buy has meaning, value and a reason. I just don't buy to buy to have. I use to do that way back when I started and I spent so much money on things I've never even scrapped and just recently threw my back-up copies of said products in the trash!