+1 on cat, and also dog, for snuggles, laughter, and connection
+1 on food: for me, often prepackaged, frozen, or deli meals, so not quite restaurant expense but not ingredients that I assemble myself
+1 on keeping the house warm
+1 on video games. Bang for the buck, they're much cheaper than movies on a per-hour basis. (But I also work in the games industry, so it's partly a business expense to keep up to date.)
Also:
Netflix and Amazon Prime, and a nice TV.
Electric blanket, because screw getting chilled at night in the wintertime.
Comic books. Because the good ones are wonderful (Saga FTW!), and sitting with spouse on the couch on the weekends reading together brings us both joy.
High-quality bed, because of tricky back issues.
Someday, spouse & I may invest in a housecleaner. That is the one non-mustachian thing I want but haven't yet set in motion. I haven't yet been able to justify the expense to myself. Also I'm not crazy about having strangers in my space. But maybe someday.