Spontaneity! The purchasing of items you really, really don't need.

Yep! Going to need to admit it, but I'm a sucker for many a nerdy/geeky item. After all, a fez, a Tardis! what more can you possibly desire? (Okay, I'ld also want an inflatable steerable version of the Spaceship Yamato, but thankfully I haven't seen this available (yet).