We've got a local LARP group in my area and we've been struggling with getting a good set of core rules. We've borrowed for a few system, but none of them seem to fit exactly what we want to do. Either the system is too battle-focused or too rules heavy. We're looking for a system that's rules-lite but provides for melee, ranged attacks, and some sort of magic system, but doesn't interfere with the actually playing of roles?
We never picked one system to follow closely, we've also had our own home-brew system. The problem we constantly ran into was that the system either depended too much on melee combat, leaving the magic users weak and useless, or overpowered the magic users, making the melee combantants feel useless. When we worked on trying to balance everything the rules just exploded and got overly complicated, making it no fun for anyone trying to roleplay a character. Therefore we don't want to roll our own, we want to use a more tried and true one.