I recently discovered the Event Flair gadget in Calendar. I like it, and I use several icons with an obvious link to the type of event, and others with colorcoding I decided for myself.

But now I have a suggestion: I could think of lots more, meaningful icons. Like maybe a schoolbuilding or chalkboard for school-type events, a musical note for music lessons or so, a discoball for parties, a pricetag for shopping, etc.
That beam on the right has a lot of space left which we could fill up with more icons. So maybe besides more meaningful ones, there could also be more diverse versions of the same for different tastes. And maybe they can be bigger on the right to be able to make and view a more detailed picture.
I would offer to design more and implement it in a Lab, but I really am a n00b and can only use paint. A bit.

Anyway, the most important: more icons! I can handle much more; who's with me??