You are missing the point. The password should be easy to remember and hard to attack. Requiring capitals and digits makes it harder to remember and, as user tends to use "Admin1", "qwerty123" and similar things, easier to attack. Exactly the opposite. Personally I use just whole phrases as passwords, which are very hard to attack both with bruteforce (as they are long) and dictionary attack (as each word in a sentence multiplies number of combinations by the size of the dictionary). For example "morphosniejesttakimzlymsystememjakmoglobysiewydawac" is very easy to remember (for Poles, that is), but very hard to guess/crack. BTW, no it is not one of my passwords, just an example.

BTW requirement for digits and capiitals has been removed already by the forum admin.