Was continuously studying, & sitting exams for my work. This was for 45 years' of my career.
Have had ENOUGH of FORMAL study!
IF, & that's a really big IF, I got motivated enough, I'd study for my Speech & Drama Licentiate. Two exams of one Practice, one Theory. End of. But that's not going to happen in the foreseeable future!
In the meantime, I 'hobby' study multiple liked Subjects, by watching, & listening to DVD's from 'The Great Courses'.
I find this very relaxing, as NO exams required, & I can just absorb the info like a 'sponge'! Keeps the 'little grey cells' active, too! It's just like watching a Documentary on TV really, of one's favourite subject(s)!