Monkey's Audio (APE), mainly because it compresses very well (beats all mainstream codecs, only the exotic and VERY slow algorithms beat it), but also due to it being simple and effortless in use. No portable support as far as I know though, but I don't use that anyway. :)
It's kind of like RAR vs Zip, where FLAC et al is Zip. No contest except for portability.
It's kind of like RAR vs Zip, where FLAC et al is Zip. No contest except for portability.