My PS Vita: There aren't that many games I like on it, though that might not be the case in Japan. I don't speak Japanese(yet), so I can't play those yet.
My laptop(Inspiron 15 5548, i7 + touchscreen model): I gave up on a matte screen to have a decent 1080p one. Sadly, the 1080p models are all touchscreen-enabled, and they have this bezel around the screen, so you can touch every pixel. I don't use the touchscreen.
My laptop rest thingy: It's supposed to let your laptop rest on your lap(duh) on different positions, but my laptop's center of mass is too close to its screen and it falls over. It's also not very stable. I ended up using a bed tray thingy.
My wall clock: It took me a while to find a clock I liked. When I finally did, I didn't want to drill holes on my wall, so I used scotch tape. It fell off the wall one day and broke.
My phone(Xperia Z3 Dual), sorta: I don't use 2 SIM cards, but the regular model wasn't(probably still isn't, I don't know) being sold in Brazil at the time. I didn't want a Z3 Compact because of the 720p screen(negligible difference, I know, but I thought I'd watch anime on my phone). I don't dislike my phone, but there are some things I'd change about it, beginning with the screen: IPS LCD might be cool for some, but I miss [AM]OLED.
My Dingoo A320: I was more of a retro gamer in the past. Sadly I don't play games that much anymore, and the Dingoo wasn't used much.
A CD of IU's Lost and Found EP: I bought it as a surprise gift for a girl I was friends with(o-oh, y'know), but never got the chance to give it to her. It's been a long time since we last spoke.
My old Samsung TV: It was possible to disable overscan on only ONE HDMI source. The other two or three weren't used because of that. I have no problem with overscan on my current Sony TV.
P.S.: Do these count if not all of them were bought with my own money? I paid for like three of them, contributed to two and got the rest from my relatives. Call me spoiled, I don't care.