This is why I love this forum, and shows what a hard life our more highly qualified and more watched peers have. We've all been prompted to look at 3 clips, with replays, and slow motion - and we can't agree! I don't watch enough full football league matches to have opinions on individual referees so i will just talk about my interpretations on the decisions.
1 - No penalty, light contact and striker already going down
2 - i would go penalty - striker gets there first, pushes the ball away from defender who caomes in with the wrong leg, and contact high on leg - striker is 'looking for it' but imho he finds it.
3 - Ok we might all agree on this one - penalty, although his hand probably isn't quite as high as you might think when it touches the ball, but keeps moving up after contact with the ball. but even still arm straight out is also unnatural