My character is always insulting or yelling at peds when you dismiss, tell them something, pressing E to say Hi, ect.  When I press M there is a dialog line and it's selected to HI.  So where else do you change the way he talks?  My a-hole character needs to be taught some manners.  I'm tired of him always cussing or insulting everyone. 

Unfortunately that's kinda just the way it is. All the cops are stereotypical assholes. Honestly the over the top cartoonyness kinda makes it funny and entertaining for me.

I guess but I do remember my character had a nice dialog a while back.  Then I didn't play it for a while and after some updates something changed the dialog.  I almost think it's LSPDFR.  I think in 3.0 is where I could change the dialog attitude and he had  more pleasant responses. 

Some plugins allow you to change dialog. Would be a cool audio pack if someone really wanted to do a whole bunch of voice lines to replace all of the files. Hell I could do it if I had the time or patience, which I only get if its a paying gig currently.