I'm pleased we have a royal family only for the reason that a presidential system would be far more political as every president would come with their own political baggage.
The royal family, along with the BBC, is one of the few things holding society together, from becoming something more akin to what we see in the US. A completly divided country where half the population don't believe the outcome of a democratically held election.
If anything Harry has brought that all a bit closer with the selection of his future partner. As an intelligent bloke, he should have thought through the consequences, but there again, with love, the heart tends to rule the head. But it was better for the country when they stuck to marrying other European nobility.
I agree about the BBC and Royal Family they make us Briatin along with Wimbledon, Tea and Scones, Formerly BA, E-Type Jag, The Beatles, Concorde, Afternoon Tea, Crumpets, Fish and Chips, Rolls Royce, Red Telephone Box they are part of our culture. However us turning into America without them we wont why because we are much civil and are much smarter and don't have as many deeply religious, Poltical Rednecks that America does. All Brits to a degree respect desicons I never heard Labour supporters say stop the count the Tories are cheating because we aren't gullible to beleive what they say.