A different perspective here. I'm a senior FO in a larger base. I bid minimum hours. I work only Monday, Tuesday, and Wednesday. In my base, Tuesday is a low flying day, only a handful of flights. Occasionally I can't get Tuesday so I instead work M-W-Th. On average this works out to 11-12 days of work per month.
Since I live in base, having a single day off here and there is just fine with me.