Mikey, my Dad has become very emotional, we thought it was just age and tiredness but maybe it is another side effect. He gets weepy if anyone does or says anything nice to him. Mum & I have got used to it, but it can be a bit startling for anyone else, we just laugh it off (kindly I must add) and make a joke of it as there's nothing that can be done to stop it. If he's not weepy he's itchy poor soul.
Patients who have suffered a stroke often find that it transforms them from being reserved, stoical, self-controlled individuals into people who become very emotional, weepy, and sentimental in response even to the smallest stimuli.