The PSP imo was one of the most impressive hardwares ever. From the physical design to the menu, its multimedia capabilities, everything about it felt quality/hightech. It was basically a slightly weaker ps2 in handheld form. You had to be there to understand it, it was crazy back in the day. Unfortunately, I never owned one, but a couple of people around me did and I could spend quite some time with it (sometimes they even lent it to me). Playing GTA LCS on it was unbelievable. The only serious negative was the lack of a second stick that hindered many games.
Later I bought myself a Vita which was a worthy successor (it felt like a slightly weaker ps3, basically a psp2) that could never live up to its potential thanks to sony’s abandoning it. It could have been a killer handheld if they would have written a ps2 emulator for it at least. What a shame.