There's some things I really enjoy about running the shop - one of them is being able to make wishes come true. Admittedly, it's usually small wishes like "the distaff in oak, please" or "a biconical whorl in red, if possible", but, hey, it's still nice. Hunting down the fitting whorl, or wood, or whatever, is something I do enjoy.
Another perk is reading all kinds of addresses that there are in Germany. Combinations of street names and place names, or sometimes just the place names, can be rather funny. I have yet to send something to one of the well-known places with curious names, such as "Linsengericht" (lentil meal) or "Kuchen" (cake), though.
Third perk? I get to buy stamps regularly. A lot of the things I send out go by regular post, and Germany has a rather large set of different stamp designs, and lots of different stamp values, at any one time. So every time my stamp stock gets low, I get to look at the current offers. Sometimes I'm lucky, and there's something Middle Age related among them, and then of course I get those. Last time that I went stamp-shopping, there even was an archaeology-related stamp - one celebrating the 200th birthday of Heinrich Schliemann...