One of the most overlooked ways to spice up correspondence is postage. Although many people do purchase stamp designs that they like, I rarely see stamps used in combination (with the exception of 1 or 2 cent postage to accommodate rate increases).
In this case, I was mailing a piece of business mail. So I wanted to keep it professional. But instead of metering the envelope, I used a combination of stamps to total the $1.22 postage fee.
I think it adds a bit of a personal touch to the otherwise plain manila envelope.