Look at you go, Leo! For your first couple of attempts, I think these are both very good. I love the palette on the first one. Thicker=texture, which I am very fond of, so it's hard to go wrong there with me.

They are both very pretty.
I have some gouache paints around here somewhere, and used them sparingly for some art project years ago. I liked their texture, but that's all I can recall. All I know about acrylics is that, aside from cleaning up easier because they are water-based, they dry a lot quicker, which can be a plus or a minus, depending on your desire to re-work anything.
Keep up the good work, can't wait to see more!
This is a fun thread, because everyone is working with different mediums and approaches.