I'm 5'10, not skinny, inexperienced, clean, respectful[...]  to my mind, this grammatically reads like "i'm not skinny, not inexperienced, not clean, not respectful" IMO, if you list several properties, you start with the true ones, and then the not true ones. because once you start a list with "not X, Y, Z,...", the "not" applies to everything after "X" as well. on the other hand, my native language is german and in german this rule would apply. don't really know how/if that works in english as well...