Keep in mind that, if you were to listen to him say all that stuff about how exhausting and kinda horrible Portland is, it wouldn't sound hostile or particularly dick-ish. It would probably sound more like a child who talking about which toy they like the least: free and confident. Because you can't sound overly aggressive when you have a lisp like that. It's an impossible feat. The only way you can sound is lovable. Like a f*cking teddy bear wearing a cotton candy necklace wrapped in butterfly kisses. It's not quite as pronounced in his singing as in his day-to-day speech (on some songs, however, it's easy to spot), but it still gives his vocals a less visceral edge, which is probably why he prefers to howl combative lyrics.
