It's important to have an accent that is not difficult to understand, but it doesn't have to be a particular native one.
I think people want to understand all kinds of English unless they live in a city where people have a certain accent.
Having a good vocabulary and grammar is more important.

I don't know many accents, I'd say I prefer British( RP I guess, but others can have similar characteristics) over the 'typical' US accent. I really like their [əʊ] sound.

I think it's because learning an accent isn't necessary for learning a language. People speak with an accent which is acquired through various factors but it's natural, not forced. Native speakers have accents - and they vary a lot! Every non-native fluent speaker I know speaks English with their native accent. To my ears, nothing sounds more fake than a non-native speaker speaking with an American or British accent as there is actually no such thing and so they end up sounding weird.

Accents seem to be a really hard, but interesting thing!
In Russia we usually learn 'BBC English' (at least we try :D), though, I find London and Cardiff accents really understandable. Also American accent in general is pretty easy to understand, unless it is a Texas accent, you know :>>

Koreans learn American accent in English, so never interested in other accents. And getting fluency itself is more important than accent for most people here.