herrKanin,
At its very basis, blues improv. follows chord tones as mentioned above from a somewhat modular basis- 5 little notes that can be found in boxed patterns along the neck (1st, b3rd, 4th, b5th, b7th of the particular scale) . The beauty of the pattern itself is that you can apply it to any key.
I have found, in my humble opinion, that the less notes played the better. And that without bends,
slides, hammer-ons and pull-offs, the notes sound bland and uninteresting.
Let the music flow from your fingers- live it, love it, experience it.....