I started playing BRP in 1983, two years after I began D&D. For me, it's like my old Amiga 4000 computer -- it outperforms top of the line stuff today on a technical level; the problem is it's stopped being made and its following is too small. I still use the BRP system and am currently writing a homebrew based on it.
For those who don't recognize the acronym, there is only one surviving BRP product: Call of Cthulu. But my favourite was BRP's fantasy game: Runequest; Stormbringer was pretty good too.