Verb tenses, because I'm still in intermediate level and many times i forget the verb tense for a especific phrasal verb or an uncommon irregular verb. For now I'm trying to learn all these things that you wrote toghether.

I would probably focus on accent reduction because as a French person, my accent is awful. English is a poly-morphous language. Because it has borrowed words from Germanic and Old English in first instance, then Latin, Greek, French (...) a lot of borrowed words remained the same but they are pronounced differently. Therefor, letters pronunciation changes all the time : Wild ( Waïld ) Wilderness ( Weelderness ). It's hard to re-learn all the word with a correct pronunciation, but I like it. Also, when it comes to speaking English rapidly, I lose the track ^^ French tends to speak English with a "kissy mouth" ( articulating all syllables), adding extra-swallowed H, and it's absolutly impossible for me to pronounce the "The". ZDtZZDZsSZe ^^

Learning about anglophone accents would be great for me.

I would like to focus on the British accent,It appeals to me ,especially the Scottish accent.I prefer to watch some British tv series rather than American ones. For instance the midwife .

I would choose to enhance my accent since I see it's importance in decorating and beautifying the language and allows others to understand the speech easily, it's a big defect since most learners don't give much care to it but I am aware of its magical impact on the usage of the languages