Well, I have my thoughts on the Go. When I bought my PSP, the Go was announced, but not yet out. But I knew I didn't want the Go from the get-go. (Even before I knew what it would cost...) I don't care about UMD Videos, and I don't resell games. But, there are more PSP games availiable on UMD than PSN, and even the things that are only on PSN can also be accessed on a 3000. And game pricing, it's nice being able to pick up cheaper used games, especially when also on sale, which is not an option on PSN.
Size also turns out to be a nice benefit for me. I have rather large hands (typical for an adult male, I would guess), and they cramp when I hold something too small. I tried holding the PSP Go for a bit, and I knew the way I held it instinctively would cramp my hand. Plus, the 3000 still fits in my jeans pocket, and should I feel the need to have more games with me, I have several UMD holders (each holds 5 games) that clip to a belt loop. And the game collector in me? What if I get too many games for the PSP Go? No matter what, I can't bring them all with me at that point. The 3000 fits all my needs for a gaming system, something the PSP Go can't do.
-dunno001
-On a quest for the truly perfect game; I don't think it exists...