By deciding to self hynopnotise you are being controlled by your emotion, all be it in a good way, it's emotion that's directing action not action directing your emotion, if there was no underlying emotion controlling it you would have no reason to listen to Paul McKenna in the first place. Listening to the C.D might change your emotions, but again you have little "control" over this yourself, it's just a subconscious reaction to it. You can say as much as you want that you are not controlled by your emotions and you control them, but it's emotion thats telling you that. Emotion is as constant and ongoing as your consciousness and any changes or actions that instigate changes are a result of your previous emotions anyway, hence no control.

The emotion is automatic and directs action or inhibhits it, just because you find yourself getting better results with emotional outcomes does not mean you are in conscious control of it, it's just something that happens with experience as you have different reations to situations and your subconscious can handle it better.

Likewise with the experiment mentioned by RLJay, emotion tells the participants they must conform, therefore they are not in control, but are just influenced differently in the form of being asked/presured to feel different emotions by the experiment which is stronger than the flashcards.