There's definitely something to seeing a kit that you want, and buying it, and then just looking at it, thinking about building it, how much fun it'll be, etc, etc. And you buy it, and if you don't build it right away, it's just another kit in the stash (with apologies to Pink Floyd).
I know that I've gone on binges to buy kits, for specific collections or themes. For example, I was on a yellow-wings kit, especially after I saw Accurate Miniatures' F3F and SB2U kits, and Classic Airframes' Goshawk and F4B-4 kits. So I picked up a bunch of those. That was almost 20 years ago; those kits moved with me to my current house in 2002.
Next was a collection or theme of "All US Plane Types Used at Midway". Then I read "Doomed at the Start", and started acquiring kits of USAAF aircraft in the Philippines at the outset of the war.
And I've got a stash of 1/72 Italian fighters from WW II, and 1/700 kits for the theme of "Our First 10 Carriers".
All that time, it was fun to think about building them, but I'll never really finish them all, nor be able to display them all.
So I may just take a table at a show some day and unload them, so someone else can enjoy them.