I think it is fine grammatically, but you could be more specific in detailing whether you are talking about whether you like the way English is spoken by a particular person, or you like the sound of spoken English, or you like the grammar structure (doubtful!). The exact meaning is not clear from your sentence. By the way, your first sentence should read "I am wondering whether this sentence is correct", or "I am wondering if this sentence is correct".

Yes, definitely. It suggests you like the tempo, its usage, amongst other things about the English language.

Yes that is correct