Good job, Bainbo! As a former system administrator I applaud you! The only change you might make is using a "special character" (if the site accepts them, and most do) or using "LEET" character transforms. Your password "SQi8eiou" could become "5Q!8e1Ou" (that a capital "O", not a zero. Just be sure to be consistent in your usage.

LEET (from Elite): 4 or @=A, 8 or 6=B, 3=E, 5 or $=S, 7=T, 1 or !=I, 9-G, \/=V, |<=K, and you can think of others. Of course, the numbers also stand for lower case and some, like 6=B, are based on a fanciful resemblance of the lower case letter to the number (b=6).

I know some folks who put their password in Roman numerals: 1776 becomes MDCCLXXVI, in upper or lower case or both.

Just be consistent. This way you CAN reuse passwords for different sites and still remember them AND they will be reasonably secure.