I just bought a "guilty pleasure" a few days ago. It is audio-related, but not exactly hi-fi.
It's called a Tweakalizer, from Behringer, and is described as a "DJ effects processor". It can be used to do that horrid "scratching" stuff that hip-hop DJ types like, but also a variety of effects like flanging, with a lot of control in a pretty easy-to-use interface.
My "guilty pleasure" is to mess around with gear like this (and my Yamaha sequencer and Korg Triton synth, etc..) with a mixer and a laptop to create music and/or sound effects. I'm a halfway decent composer-arranger when I put my mind and ears to creating something that sounds good, but when it comes to electronic creation of music, I'm a bumbling dabbler with a LOT yet to learn!
I look forward to weird experiments like recording various "found sounds" using a biphonic set-up, then editing them into/with music and "processing" some of the sounds, etc.. to create a "walk through my fantasy world", etc...
Mostly just messing around, and I don't do it very often because of time constraints, but it is fun and a good way to relax sometimes. It also helps me sometimes to understand better what I'm hearing in recordings; what the producers were doing when a recording was made. If I learn to use the gear well enough, I might actually record/create and release something, in my eventual retirement.
