Another couple of typography tricks that may be worth trying out:
- For angry speech or shouting, you can try a coloured inner stroke to the word balloon. This works well if you combine it with interesting balloon shapes to suggest fiery, icy, or acidic qualities to the speech.
- Applying some random jitter to individual letters’ size, baseline offset, and rotation can introduce a bit of chaos, if that’s desirable.
- Play around with warp and distortion effects. Joyful or musical speech - and especially sound effects - can benefit from wave, flag, arc, and bulge treatments.
- Sometimes you can even have the type expanding outside the confines of word balloons. To do it with the style you’re using, you’d scale the type up so it’s pushing against or breaking the boundary of the balloon, and then apply a white stroke to the outside of the text, so it’s like the balloon is wrapping around the letters. This is usually only done with single words - I could see it working with the little brother’s “Martin!”