Over Christmas I watched a lot of Dave Gorman, which inspired a graph of homebrew costs since starting in September 2008 to the end of 2011. The bottom line plots the cost of a pint @ 40p (below this line must be bad by definition), the middle line is the cost of a pint @ £1.50, ideally I'd be below this line.
The navy top line shows the cost of beer
The next graph shows the pints brewed vs pints drunk, showing the 2nd, 4th didn't cut it, and the 8th brew survive long enough to drink... happily the last brews have been consistent.