Rachylou, #2 and #4 are adorable. Keep them, i. e. for the office and for situations like those described by Krishnidoux and L'Abeille.
I and my fussy feet love ballet flats with round toes. However, I prefer shoes that are not completely flat and soft, but rather have a low heel and some structure. Some of mine have built-in support, and when wearing those who haven't, I'll often wear insoles (Pedaq).
I use my ballet flats a lot. In fact, they are my "go-to shoes." For decades, I have never been without at least one pair of ballet flats. At present, I have nine pairs in rotation. Three of them have been purchased during the last couple of months. Ballet flats seem perfect for my feet, my style and my lifestyle. I feel I can wear my ballet flats anywhere and with all sorts of outfits. They are also very easy to pack.
When walking long distances, I prefer--and recommend--walking shoes.