Where to be a tourist
My favorite London Eye — First of all, there's nothing wrong with playing tourist in a city you live in. Second of all, even if you want to see London like a local, you still don't want to miss its most famous attractions, even if they can be touristy. My favorite was the London Eye, which I highly recommend you get a FastPass for so you can skip the line. The wheel gives you 360-degree views of the entire city, which is gorgeous on a clear day.
Other recommendations: Buckingham Palace Changing of the Guards, Tower of London, Victoria & Albert Museum