For me it's the history and the fact that so much of our culture and laws come from England. I like the Royals and as others have said, it would be interesting to see one (although that makes them sound like prize pandas on display), but the main appeal of England is the country and its people. I think Bill Bryson said it best in his wonderful book, Notes from a Small Island.
Suddenly, in the space of a moment, I realized what it was that I loved about Britain - which is to say, all of it. Every last bit of it, good and bad - Marmite, village fetes, country lanes, people saying 'mustn't grumble' and 'I'm terribly sorry but', people apologizing to me when I conk them with a nameless elbow, milk in bottles, beans on toast, haymaking in June, stinging nettles, seaside piers, Ordnance Survey maps, crumpets, hot-water bottles as a necessity, drizzly Sundays - every bit of it.
What a wondrous place this was - crazy as f*ck, of course, but adorable to the tiniest degree. What other country, after all, could possibly have come up with place names like Tooting Bec and Farleigh Wallop, or a game like cricket that goes on for three days and never seems to start? Who else would think it not the least odd to make their judges wear little mops on their heads, compel the Speaker of the House of Commons to sit on something called the Woolsack, or take pride in a military hero whose dying wish was to be kissed by a fellow named Hardy? ... What other nation in the world could possibly have given us William Shakespeare, pork pies, Christopher Wren, Windsor Great Park, the Open University, Gardners' Question Time and the chocolate digestive biscuit? None, of course.
How easily we lose sight of all this. What an enigma Britain will seem to historians when they look back on the second half of the twentieth century. Here is a country that fought and won a noble war, dismantled a mighty empire in a generally benign and enlightened way, created a far-seeing welfare state - in short, did nearly everything right - and then spent the rest of the century looking on itself as a chronic failure. The fact is that this is still the best place in the world for most things - to post a letter, go for a walk, watch television, buy a book, venture out for a drink, go to a museum, use the bank, get lost, seek help, or stand on a hillside and take in a view.
All of this came to me in the space of a lingering moment. I've said it before and I'll say it again. I like it here. I like it more than I can tell you.. - Bill Bryson, Notes from a Small Island
