I marched too, but not because I love the EU or because I think I'm special. I marched because I am so worried about companies leaving or going out of business - taking jobs with them; I'm worried about the tax take plummeting and with it, what's left of our public services.
TBH I wasn't entirely comfortable with all the blue-and-yellow costumes, and was pleased to see some union flags. I wasn't marching because I love the EU especially - I do appreciate what it represents in terms of co-operation and peace, and getting everyone invested in, working in, the same economy so they don't want or need to fight. But it certainly isn't better or more important than my own country.
If we were (for the sake of argument) currently outside the EU, and joining would cause us the kind of damage and disruption that leaving will (especially if there is no deal), then no way would I want to join the EU. It is because of the disruption and damage caused by leaving that I want a people's vote, not because I think that everyone who voted leave was a fool. They weren't. There were - of course!- a lot of good reasons for not being in the EU, as well as a lot of good reasons for belonging. What I am trying to say is it wasn't "obvious", at least it wasn't to me.
What is becoming obvious though is that it is the process of leaving - the forced change and disruption - that is going to hurt us so badly - and for such a long time. Even some Brexiteers have admitted it might take 50 years to recover. The unhappiest and unluckiest people in the country certainly should not be being made to endure things getting worse for 50 years before they can get better. None of us should.
Our economy is entwined with the EU, like a big tree with its roots wrapped into every country. And we are not carefully loosening some and replacing them in well-prepared soil in third countries, we are just ripping the whole bloody thing up, and hacking off the bits that won't come loose. Yeah, maybe that field over there would have been a better place to grow our economy, maybe not. But this is a mature tree not a pot plant. If you yank it about at random, it's going to suffer VERY badly.
That's what I don't want to happen, that's why I marched.