It is certainly not good to play, if you are in a bad mood, because it will typically lead to poor decisions. Most commenly this is referred to as tilt, and it can result from losing or from things unrelated to poker such as being tired, sleep deprivated, drunk, hungover or stressed. Ideally you want to go into each poker session with a clear and positive mindset. This will not assure, you cash in all the tournaments, you play, but it gives you the best chance.
if I'm in a bad mood I always lose. if in good, then luck smiles at me. Do you have the same?