Austrian here. My school struck to Oxford English and we had speaking exercises to get us to adopt a British accent. (Their main goal was to make us sound more native and less like Arnold Schwarzenegger). American and Austalian accents were accepted but not actively encouraged by the teachers.

I myself tried to adopt the British accent but I think I kinda ended up in a weird mixture of British and American English :')

Finn here. Never tried to imitate anything. More like tried to find a clean and sensible or neutral approach if possible, if anything.

German here, I started with a mishmash of accents I think but it probably trended towards US-American. Then I binge-watched Monty Python and Doctor Who in my 20s and I can say with a fair amount of certainty that that's the point where I inadvertently started doing a rather posh British RP accent. It shifts around a bit, depending on what I recently watched (David Tennant always infects me with his accent) but I find that stereotypical British accents are closer to what my mouth does in German so it's actually easier for me than other variants of English. Now if only I could get rid of all the US-American vocabulary I've picked up over the years.

Im German

I tried to imitate a british dialect in school, but it ended up more American with a very little bit of irish because of a vacation there and because of some YouTubers I like to watch. But it's a very light accent, like d/t instead of th - "cat'hedral" instead of "cathedral".

I didn't try to imitate any particular dialect/accent.

It is hard enough to learn a second language. I simply imitate whoever I interact with, or passively acquire the accent while watching/listening to media.

Edit: such weird rule to require saying which country I'm answering for. It isn't always relevant. To avoid this answer being removed, I will say it anyway: Hong Kong.

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Dunno about trying to imitate dialects but -

I'm a gamer that has played western games the most. I assume that means American English. All those youth years of mine delving in and jumping from a game to another, listening at cutscenes (with subtitles on of course) and talking to other gamers once in a while has probably the most influenced my skill of english.

I think I talk American English pretty fluently nowadays, although I don't speak English daily. Folks have said I'm pretty good at pronouncing.

When I started I couldn't tell the differences, so I tried imitating any native speaker I'd come across. It was rather confusing at times.

Not going for an accent, just the basic American.

I'm French, so I have a very French accent, French dialect even (many French words translate easily in English but are not as common in native English). But listening to TV shows I slowly get some US accent mixed in I guess.