It's not you, it's your brain wiring

This article says that we might now know why some people get such a high from new experiences:

Have you got the new iPhone yet? Do you like changing jobs now and again because you get bored otherwise? Do you go on holiday to different places every year? Then maybe your neural connection between ventral striatum and hippocampus is particularly well developed. Both of them are centres in the brain. The reward system which urges us to take action is located in the striatum, whereas the hippocampus is responsible for specific memory functions. ... With people who constantly seek new experiences, striatum and hippocampus are evidently wired particularly well. 

 Look, a squirrel!