It depends what special interest it is that I want to indulge in. If its gaming I will sit at my pc and do so, or pick up a controller and play. If I'm unable to do a special interest due to limitations due to covid I would research it and get ideas for when I can do things again. I generally don't let them consume my life, but I have been known to go all in on something for about a week then get bored of something due to burn out.
What would you do with £1,000,000?