I do! And I am pretty much like everybody else. (cue laffs). I experimented a bit with MP3 and LAME in the late 90s, and instead settled upon ogg, aiff, or aifc for my encodes at the time. Transcoding between between uncompressed AIFF and WAV is most just a header and endian swap, too quick and easy to worry about.
I started using FLAC in the early 2000s for my home setup, and when I bought a portable player got an iRiver H120 which I upgraded with Rockbox. The OS can handle ogg, mp3, aac, flac, wv, wav, aiff and other formats. For playback I typically use large-driver, large-diaphragm, closed-frame over the ear headphones like Sony MDR7506. Unless I am at a building site or on a noisy subway at the time, it is worthwhile. When in poor listening environments, my experience has been that better fidelity of encoding any playback actually improves the experience, rather than ceasing to matter. I would no sooner give up my FLACs than rely upon using cassette tapes unless I truly needed to.
When I had a project or a friend who needed something to be uploaded in MP3, I have done so. That’s the only time I bother with lossy encoding, because storage is cheap. If I had to choose, I have found ogg and AAC more efficient with regards to storage/fidelity.
What might be adequate quality for passive playback has often IMO been dreadful when it come to remix and reuse of lossy encodes. Especially for inharmonic material.
