Which way is up?

So, the paint is dry, and now to decide, is it done? Which way does it go?

The two I left last week are ready for consideration.

I'm leaning towards the vertical. But may need more paint. Nicknamed, The Sunny One.

The yellow one is 77" x 23", acrylic, hardbord, paper and metallic pigments on canvas.

I like it this way. For now, calling it The Green one.

It's aprox 34" x 41", acrylic, metallic pigments and plexiglas on canvas.

 Maybe the vertical is also okay?

The orientation can make all the difference. This horizontal just doesn't work.