My first batch was gone before three weeks in the bottle. My second, I still have two of (bottled it the end of may). Then I went nuts brewing and built up a stock, which is unfortunately dwindling as of now. What is fortunate, is the newly bottle Fat Tire clone and the 15 gallons of beer that needs bottled sitting next to it.
I agree with the previous comment to "move on to the next batch" and forget about the one you just bottled. That's the best advice ever. Its some of the hardest advice to follow, but its the truth.
I, personally, now being about 15 batches in, try (very hard) to not try a bottle for three weeks, at the earliest 18 or 19 days. I just figure that any bottle opened prior to that is like wasting what's going to be good beer.