I decided to try Inktober this year as a way to get my back into drawing daily. I started strong but ultimately life and work got in the way. These are my favourite three. I went for a superhero theme whilst following the official prompts.
I will try again next year and will hopefully keep it up for the whole month.

The Flash
Promt - Fast

Silver Banshee
Prompt - Noisy

The Collector (Taneleer Tivan)
Prompt - Collect