I really enjoy drawing and painting flowers. They make for great doodling subjects due to a certain freedom about them. As long as I have a stem and something leaf-like I can have a plant. Flowers are a lot like cats in this way. You just need a few recognizable features and you can manipulate the rest however you choose.
See what I mean? I could have done dots for the stem or used some other shapes. It is also easy to make a flower into a character. Two dots and half a circle add so much simple warmth and expression.
I especially like dandelions. They are such a beautiful weed and their seeds just beg to be blown. Happy wishes!