I have 5 taps (1 nitro) and am the only one in my house currently. I would say my average is 2-3 months. If I have something that seems to be going downhill, or has reached it's peak, it will get more attention. I think if you're the only one drinking, it's useful to lean toward styles that will last. I have a porter, and a barleywine, and a mild. All of which aren't hop forward and won't deteriorate or will get better with age. Hop forward beers, I tend to shoot for the border. For example, the area between where Pale ale and IPA cross. So it starts a low end IPA, and slowly deteriorates into a high end Pale ale. So you get a little extra time, but after 3 months or so, it's just a sad Pale.....so there's still a time limit if you go that route