I disagree. I'm generally in a lot better mood when on, but sometimes my temper does flare more easily. I feel less empathy and more domineering while on too. Mind you, it's not a drastic change, but it is a change. Going off cycle is indeed the trickiest part.
One thing that does change a lot is LIBIDO. It's usually ski high, and I become a risk taker. I'm a lot less careful and picky with girls LOL I laugh, and I love it to be honest, but it can be scary what I do at times.
My main point is that yes, there will differences in mood and attitudes. Not necessarily bad differences, but if you worry about emotional sides, I do think there are some. Again, most are positive changes or simply different, but there are some.