x2 on what Alpha said, those hooks are VERY brittle!!
I actually like to close mine just a tad to keep the snags down, and I have broken several, so be careful when bending them
Having said that, I don't think closing the hook has hurt my hookups, I just try to let them take it and I don't really set the hook, I just slowly move it to the side as I feel the hit.
I miss a few doing this, but not too many when I'm in decent sized fish. This is panfish and bass, not trout.