Advocating tradition and prizing local color and folk customs are among van der Loon's most dearly held beliefs, and performing field research to obtain firsthand information is a point that he prides himself on.
崇尚傳統、重視地方色彩及平民風俗，是龍彼得最堅守的信念；而藉著實地的探訪，做「田野調查」來獲得「第一手資料」，則是他最引以為傲的事。