My designs are theme based on the 4 seasons.

There wasn't much reason to choose 'F' and 'Q' other than fact I want two letters, one having more edges while other more rounded.

Going from top, left to right, Spring -> Summer -> Autumn -> Winter

Spring having a more green feel to it. Its the season that everything feel fresh.

Summer have a more yellow/orange feel due to the hot burning sun, and our beach.

Autumn is when leaves start to fall, red leaves and dry branches are all over the ground. It have a more dull yet reddish feel.

Winter is the season of the cool.  White snow, blue chilled land and dead wood.