Requested by @okayerin
I'm no expert, but I consider myself a hobbyist and a compulsive pen hoarder. (Sorry if this is super late, @okayerin!) The photos aren't very good (bad lighting + flash + I couldn't be bothered,) but I hope this gives you an idea of what you can do with each type of pen!
  1. Static
  2. Static
  3. Static
  4. Zig Kuretake Brush Writer (No. 22)
    Used for the first three photos. This is my favorite, because it lets you make really fine lines if you're patient enough, and really broad strokes. You squeeze part of it so that the ink will start to flow. It's refillable, and I like dipping the brush in different colored ink (see: Xanthippe from my previous list).
  5. Zig Kuretake Brush Writer (No. 47)
    This was a gift, and I love how bright and spring-y this green is.
  6. Zig Brushables
    This was my gateway brush pen. Both ends are brushes but with different colors, which you can use for blending (I don't know why I didn't blend in this photo to demonstrate.)
  7. Zig Scroll & Brush
    One end is a brush pen, and the other is a flat/split pen, both of the same color. I have yet to figure out how to use the flat end.
  8. Kuretake brush pens
    I'm not sure if there's a specific name for this, because the pens just say "Kuretake" and I can't read Japanese characters. I have them in Olive, Red, and Lemon Yellow. The Lemon Yellow was pretty disappointing because it hardly shows up on most types of paper.
  9. Kuretake Fudebiyori (metallic)
    I LOVE how shiny this is. It also works great on black paper.
  10. Marvy Le Plume 1122
    I've honestly never heard of the brand before, but their stuff is amazing. The colors show up really well, and the brush tips are sturdy and are really easy to use, especially when you're just starting out.
  11. Pentel Touch
    I just got this, so I'm still figuring it out, but the brush seems sturdy and may be good for more ~delicate lettering.
  12. Zig Cocoiro
    These are adorable brush pens. I always buy mine with extra fine nibs so I can use them for everyday writing, but they're still pretty great for brush lettering.
  13. Water brush pens
    To use these, you fill the pen with water (or ink), and squeeze it so that the water or ink goes to the brush. You can use it with watercolor, or with inks. (I was too lazy to grab my water colors so I just used inks for this photo.) I have a Pental brush pen and three generic brush pens with fine, regular, and broad brushes.
  14. Artline Stix brush markers
    These are crazy cheap (less than a dollar each here,) and come in a really good array of colors. The only downside is I tend to grip my pens tightly, and as you can see, the body of the pens have Lego-like surfaces and the triangular shape of the barrels may take some getting use to.