As for myself, somehow I have easier writing in English than Swedish. I think for me it comes from when I read a lot fanfics online in English, I found new friends in other countries and started communicating with them on a daily basis.
I even watch anime (Japanese cartoons) and they are subbed in English, I still remember when I was the most active, I couldn't even think in Swedish. I struggled with Swedish words and could only come up with the English words.
It still bugs me that "it makes sense" doesn't have quite as good translation in Swedish, as well as the word "lagom" doesn't exist in English as an equal translation for it anyway.
I think I have an easier way expressing myself in English, I've been in Ireland a couple of times and I also plan to go back. I must say I loved their accent. Also when I was in China I met some Americans, and all I've met both online and in real life (irl) have told me that I'm good at English. For me it's quite enough to be good at it and make other people understand what I'm trying to tell them, sure sometimes it can be hard when you talk. It's easier when you write and you can think more thoroughly about what you want to say/write.
When talking, it's often a bit harder especially if one word gets stuck, but most of the time it's just to keep talking and trying to explain. I loved being in Ireland, sometimes they helped me when I struggled with a word and that was really good.
I recall when I was in Ireland I came to learn all those technical terms about horses. Sure I had seen/heard some of them before, but many were new.
Like going for a hack, when you take your horse and ride out in the woods or something. I learnt the difference between gallop and canter, and that tack is the horse's gear.
It was really fun to combine a vacation trip with horse riding, training English and having a lot of fun, and last but not least, making new friends. I loved it.
Today I think English is very good to know, cause many people can speak it and understand it, so you can communicate with so many people. I know my grammar is far from perfect, and I'm mostly self-taught. Since English in school sucked, we had a teacher who was not so inspiring.
I could probably go on and on, but I do hope that there's more people out there who enjoy the joy of English and the freedom it brings. Freedom to communicate with so many people, you're not locked to those countries that understand your motherlanguage etc.
To be honest, if I didn't have something that rooted me here in Sweden, I would probably have moved to Ireland, but as it is I'm still happy to be able to go visit and still live here in the beautiful yet cold Sweden.