In all the different years, with different themes, with different camps, and different companions... we all have those little things that are the same each time we come home. So once all the basics are done, what is it you do on your first day on-Playa each year (besides visiting The Man)?
For me; once camp is established, the man visited, and cold beverage prepared... I decorate my bike. It arrives at the event mostly "normal" looking; maybe with a leftover ribbon or blinky light from the previous year. I usually have an idea of what I'm going to do with it ahead of time & pack accordingly, but I always have extra odds & ends "just in case". This way each year I end up with my own little funky, in-the-moment, born-on-the-playa mobile art piece.

