What is your favorite kind of jelly/jam/preserves?

Since my other question was about butter, I figured I should ask a question about jelly to go with it : )

If anyone would like to describe the difference between jelly and jam and preserves, that would be nice too.

I’m not sure if my favorite, marmalade fits in to any of these categories.

I don’t like commercially jarred strawberry jelly (because most of the ones I’ve tried are really lumpy) but I’ve had fresh strawberry preserves (is that the correct term?) and it is one of the best things in the world, especially if it’s served with clotted cream.

Lastly, for the Brits, is jelly/jam/preserves, the same thing in the U.K., or do you guys have other words for what we Yanks call it?