For me, there are two sources that account for the largest share of my path:
1) Direct observation and experience that is firsthand and/or personal (aka, personal gnosis)
2) Direct observation and experience that is conducted under the methodologies of empirical naturalism (aka, science)
Traditional Pagan mythology, storytelling, or folklore plays a very minor role in my path compared to these two. This isn't to say I don't use it often – I do, but it's just not my focus as it may be for other Neopagans. Neopaganism in general heavily emphasizes the first source of knowledge, which is perhaps why these paths have gotten a reputation for being mystical or mystery traditions. You deal directly with your gods; you don't need any intermediary, whether it is a text or a clergy member. Written scripture is simply not a big element.