I love folders. Finally I can install 300+++ apps (up to 2000) and not have to delete em. Also I don't have to scroll through 10 pages of apps to get to what I want. I have home screen 2 with nothing but game folders. Game folders 1-16 full of nothing but games this could not be done without folders. They simply wouldn't fit within the 10 screen limit.
Plus there a hassle to scroll through all 10 Home screens when I wanna browse for a game to play.
Also when I want to check out my music apps, bam..music folder. I want to view some streaming apps (twit, Justin tv etc) then I goto my streaming folder.
I want sports, I check my sports folder. It's a much better way of organizing and browsing my apps. Love it!
Huge folder fan here. Allowed me to decrease my totals pages by a third. Must less paging and easier access to apps. My favorite is the ability to place a folder in the bottom dock. I'm a photographer and this has allowed me to have a folder there for my different gallery apps for easy access when showing clients. Just wonderful.
At first I didnt think I would like the folders since it took an extra click to open the folder then another click to launch the app. But once I had everything organized, I realized it would actually save me clicks since I didnt have to flip through 7 or 8 pages of apps. Now my first page is no folders, and my 2nd page is all folders.
I'm only using 1 folder, the Utilities folder that was already there when I got my iPhone. I then moved a few things i don't use into it. But everything else is just there, no folders. I only have 2 pages of apps though.