I maybe should have rephrased British as Northern British, Una O'Conner, whom I believe gets on a lot of Americans nerves, and is the main reason of them not liking the film as much. She is a typical Northern Wifey, being brought up in the North of England I can see that character in a lot of women of a certain generation (more so when I was young). Personally I think She's great, and the old, "what's the worst thing in Bride of Frankenstein"...Una o'Conner, argument. I think she only adds to make the film the classic it is...
I think where the Invisible Man gets a bad wrap, is he's not a Monster, in the classic sense like Frankenstein's Monster, The Mummy, Creature, etc these films get banded together as a genre, yet they touch on many. The effects were the thing that got me as a kid, like Kong, Fulton's effects were ground breaking, and audience's at the time must have been astounded. Sound was new, never mind a man being invisible on the screen...
Which other Monster movie is worse, from that period.... I would have to say None, I love them all, with all there faults. House of Dracula is always slated as poor, and Yes those films were running out of steam by then, but I still enjoy it every time I watch it. Unfortunately I'm a fan of all Universals Horror, Monster, Sci-fi, thriller, etc films.... I can think of plenty of new films that come NO where near as entertaining as The Invisible Man.... Do try to enjoy these for what they are, Great pieces of Entertainment.