I've been a fan of the series since it's release. The handheld versions are nice to have on the go but the console releases are where the real fun is. The pace of the game is really too slow on the GBA and DS versions.
Love that each version of the game has nice variations of puzzle/mission modes though. Time trial in Mr Driller G is my favourite.
In truth, Mr Driller G is one of my all time favourite games.