There are few things more refreshing than a brand-spankin' new pair of contacts. The very first time you put them on your eye balls. So clear, so light, so refreshing. This may be exacerbated by the fact that I have been wearing my previous pair about twice as long as the recommended usage.
Usually when my eyes are all of a sudden dry and gunky and I can't figure out why, I start to think about the last time I put a new pair in. Most often, I can't remember because it has been that long.