I'd say that Ashers has hit the nail on the head. It's a formula movie and it's a fun "romantic comedy".
Now, as a realistic portrait of life in London, the film is undisputably poor. Many objected to the lack of black actors in the scenes set in Notting Hill, as the location is one in which there is a very significant Afro-Carribbean community, the heart of the Notting Hill Carnival, the biggest annual carnival outside Rio, I believe. I don't understand why the casting director didn't notice!
In fact, I know the exact locations very well. I could lead you to his shop and show you the cinemas and markets. I've even got a pretty good idea of where that square is, where they sit on the bench. Where she's filming on set is Kenwood House, a place I used to walk an ex-girlfriend's dog and where open air concerts are held each summer.
Despite being a "rose-tinted" view of things, I enjoyed the feeling of these places being filmed so beautifully - this is my home on show and it looks good.
The character portrayed by Hugh Grant in Notting Hill, just as in Four Weddings, is a stereotype of an ex-public school boy still working out how to be a man and not very knowing of his own feelings, let alone able to express them in a decent manner. I know a few people like that but it's hardly typical of a Londoner any more than Jerry Seinfeld or Carrie Bradshaw are typical of New Yorkers.
I heard from my hairdresser, who attended some kind of party to do with the Bridget Jones' Diary film that she found Colin Firth was far more sexy and charismatic than Hugh Grant, so at least I have one opinion from a "real person" on how his in person.