"but will never be "great" at either"
What sort of attitude is that?
Look, I understand that you'll be looking to do these things as a hobby, and that setting your goals too high ends up being demotivating for many people, but to me you're looking at this slightly backwards.
On this coding vs. blogging thing, you should do whatever you're passionate about, regardless of the results you might expect to come from it. Reading between the lines of what you wrote it seems that you'd be happier blogging, but know that its a highly competitive field, so do it for your own enjoyment and let readership levels be a bonus.
"but will never be "great" at either" What sort of attitude is that?
Look, I understand that you'll be looking to do these things as a hobby, and that setting your goals too high ends up being demotivating for many people, but to me you're looking at this slightly backwards.
On this coding vs. blogging thing, you should do whatever you're passionate about, regardless of the results you might expect to come from it. Reading between the lines of what you wrote it seems that you'd be happier blogging, but know that its a highly competitive field, so do it for your own enjoyment and let readership levels be a bonus.