One is just right. The flair is proportional, the hat isn't obscured, good font ratios. Its full, but nothing out competes. Nice touch with the double strips to add flow. Stars are in "Olympic Medal" formation implying celebration, completion and success.
Two is too plain, hat is too big, obscured; implies hiding flaws/oppression/poor planning.
Three is too busy; branches, house design and size, and font size all contribute. Window in the roof is subliminal for error. I like the book, though.
Four, the hat looks sad/depressed. Low and droopy. The stars are an afterthought; lost at the bottom, don't imply celebration, just additional stars, ratings maybe? If so, a 3 star rating won't impress.