A strong Basic foundation: rules where needed, GM leeway everywhere else. Sensible lists of spells, monsters and treasures.
Accessibility: All files free to download; many (most of the core ones) also available in source text files as well. Print copies very affordable (cheap enough on Lulu, even better via Amazon).
I started with other retroclones, and I am still a fan of a few besides BFRPG. However, it's the one I will always recommend to those looking for something to play that's easy to learn, affordable to share and most importantly FUN.
