My reason: firstly I need a light color and secondly the pastel shades like Cosmic Blue, Rallye Red and some previously available such as Habanero Red & Bold Beige are seasonal and start looking a bit out after some time. Only good till the extent of pictures and showroom. Don't know the name for that wierd blue shade and that pinkish red shade which used to come in 8th Gen. Also there was an olive green. Shades of White, Silver, Grays and Black are ever lasting and decent.
Never liked these odd crayon pack shades personally.