Thanks for posting these - they're all great, including the treatment of #1. I'm in the market for a wider zoom and like what you've shared; what lens did you use? (Thanks.)
Colours are very good & agree about the clouds but the perspective distortion in some of these frames is a distraction to me. It works OK in the impressive first photo but skyscrapers that lean over in the wide shots are not natural to my eye.
I hope the weather is as nice as it appears in your photos when I visit Warsaw next month. My brother lives there, and he and his wife are expecting their second child any day now.