I don't know if it's classified as an obsession or not. Here's an example though:
I wanted a particular style of hat. This was a really old design, and there are multitudes of variation on it. I wanted the most accurate example of how I thought it should look, so I spent several days of my online-time just looking at photos of what was available on ebay and online retailers - I didn't want to order a hat that wasn't exactly what I considered to be the quintessential version of it.
Obsession, or just being careful? One hat looked fine on the ebay photo, but when I checked it out at the online retailer of it, I found a photo taken from the side, which showed it bunching up in the back - REALLY cheesey. If I had decided I wanted it, based on their ebay ad, I would've been pissed after finding that it wasn't proper at all. I'm glad I put in the effort to look at everything that was availble from every web-retailer of hats in the USA.
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Why be a label, be yourself and keep others guessing instead. - Dee_.