Hokay, as many of my post start off - It comes down to personal preference. Go with what you like. There are all sorts of pick types out there and yes, they all influence the sound. Bottom line is what you like feel and sound wise is what you should use. For what it's worth, Tommy Carter of Jimmie Vaughan's Dallas band the Chessmen uses a quarter to play bass. He described the serrated edge of the coin as producing a delightful scratchiness as he scrubbed the strings. Billy Gibbons of ZZ Top is known for occasionally using a Mexican peso as a pick to get the sound he wants. I have seen wooden, felt, stone, plastic, aluminum and other materials used for picks. Good luck.