Not a royalist, and will not be celebrating.
But, this is an event in our history and I will watch some of the TV coverage out of interest from that perspective. We are seeing the slow end of an era and I believe the monarchy will eventually become redundant. But personally, I'd like to see it happen 'organically', naturally, as times change and we progress. I'm not one of the "off with their heads" bunch. Better to have a peaceful 'revolution' when the majority of people agree upon a principle.
I don't begrudge the street parties - for some, it will be an opportunity for a get-together after a couple of horrible years.