bottle 'freshness' is also variable on the beer you brewed. very light beers, like a witbier or a kolsch...are best drank while still young.
darker beers or those with a lot of alcohol, typically do better when aged longer and drank after a few months.
Hops also mellow out, especially the flavor adn aroma hops. sometimes a fresh IPA tastes grassy after month in the bottle...but after 2 months its almost a different (and better) beer.
Primary: English Mild
On tap: Pale Ale, Lancelot's Wheat, English Brown Ale, Steam Beer, HoovNuts IPA
Bottled: MOAM, Braggot, Raspberry Melomel, Merlot, Apfelwein, Pyment, Sweet mead, Cabernet
Gal in 2009: 27, Gal in 2010: 34, Gal in 2011: 13, Gal in 2012: 10