I like it like that ♫

[Orion]

I think that dialect in speech makes more of an impact as far as putting a solid image of what the speaking character is like. A few Harry Potter characters come to mind, like Hagrid, or Ron with his mouth full.

I agree. I was roleplaying as Venom on a site a little while ago, and I envisaged Eddie Brock as a tough guy who's lazy with his speech. So when he talked, I used a ' to take out letters of words that he wouldn't say. Eg:

"What? You tellin' me that th' fight with th' emperor of Japan is over?"

That's not the best example, but I imagine how he would say his words, then spell the words accordingly. It gives a greater sense of realism to a character, I think. Not everyone speaks with perfect English.