Kuyt is first choice for me. He replaced Hamman as the one I'm most relaxed about taking pens. I'm surprised so many say Gerrard, he's missed quite a few as well. But fair play on him, he always steps up when there's one to be taken.
Downing I knew wasn't too bad at them, Johnson's was an incredibly pleasant surprise. If they can do those on a regular basis, no reason why they shouldn't.
As for Adam, I was equally appalled by his, but until you're up there with on the pressure on your shoulders, you can't really criticise. Hopefully he gets some practice in