The first thing to remember that in Disney Pin trading is that  you are collecting pins.  Most people collect thing that they like and only things that they like.  So remember if you like the pin collect it if you do then do trade for it.  Thereis no point in have a collection of things that you really don't like.  You might be wondering where do I start?  I would start by thinking of what Disney characters you like, or what things do you like to do.  If you like Tinkerbell start looking for Tinkerbell pins.  If you like surfing look for different characters surfing.  There are so many different pins out there that there is a pin for everyone.  Even after you thought of what characters you like and things that you like to do and you still want to increase your collection I would start looking at Limited Edition ( there are only a certain amount made), Cast Member Exclusive (Cast Member have the option to buy these pin because they work for Disney), and also Cast Lanyard Series (Pins that have to be traded from a Cast member at one of the Theme Park, each park has their own series).  Just remember it doesn't matter what other people say are better pins than other what matter is that you like the pins and want them.