This actually has lessened for me as I've gotten older (not necessarily matured). I used to change my 'style' frequently and my tastes in music were quite malleable but I've been much more consistent as of late. I'm finding that I would take on certain interests of those around me (possibly for approval, possibly just because I couldn't define what I myself liked and needed a model). I'm becoming more comfortable in asserting my opinions and discovering my own tastes.
It's getting okay to be me.