There’s multiple types of brit stuff, some of which is mutually exclusive. I will expect someone who loves classic traditional comedy to hate some modern alternative comedy.
There’s classic stuff, which probably hits as late as early 90s
Inside there is two kinds, traditional and alternative
Inside there is comedy and drama
For classic traditional comedy, you’ve got Dads Army, Are you being Served, Allo Allo, Hi De Hi. Few of these will make me laugh, they’re stuck in a time before I was born. Some are properly ropey, but Americans often love them. Tend to get the oldies in the UK loving them.
Classic alternative comedy would be likes of the Young Ones, I’d even say Monty Python, and Fawlty Towers in here. Bottom. French and Saunders. A bit of fry and laurie. Alexi Sayle’s stuff. The comic strip presents (my favourite out of these, a parody series covering many films and TV). These often spread into modern, and their influences.
The distinction between classic and alternative drama is a finer line. Lots of drama from the 80s, a lot of Dickens and Austin, I’d even say some go into modern (New trick for instance on traditional). Minder, The sweeney.
Then there’s modern.
Modern traditional comedy is few and far between. It went out of fashion. Tends to be lower quality, misplaced jokes, Thin Blue Line, Mrs Browns Boys (I think this is, but I can’t bear to watch it), My hero, My family, Miranda.
Whereas Modern alternative became the mainstream, going from Men Behaving Badly (a classic americans often have missed), The Day Today, Partridge, Fist of Fun, through Father Ted, IT Crowd, Black Books, Fleabag, and loads of others. If you like these you tend not to like the classic traditional comedies. They are the opposite, sweary, sometimes offensive.
Modern dramas, well, traditional ones have come back in fashion, such as Downton Abbey and a few others. It’s arguable as to whether there is an alternative type, even the good modern ones are in a traditional “cop or coroner investigating a crime” so the distinction is how dark they are. Line of Duty, Broadchurch, Killing Eve, but goes back a long time to long series.