For me, it is bikes and bike stuff. Every time I walk in the only bike shop in Yellowknife to pick up a part or borrow a tool, and see all the high end bikes and accessories on display, I have to force myself to get what I need quickly and leave as fast as I can. Problem is my friend works there, and he never fails to get in my way to extol the virtues of this bike and that bike, telling me I should take it on a test ride, or how awesome those $200 panniers are. As recently as yesterday, I was checking whether they had a bottom bracket in stock because mine broke, and they told me I had to order it, which takes at least 10 days, which also mean I will be without wheels for some time, so it was pretty hard to resist the temptation of getting that shiny new bike. As I am typing this, the thought of going to the bike shop today after work has been crossing my mind a few times...
When I am in Calgary, it is much easier because I frequent a bike collective and my old MTB looks relatively high end compared to what most folks around there ride, plus if I need a part or accessory, I got to dig through piles of greasy parts or dismantle an old bike that has the part I need. In the end, the cheapo in me always win...