I like #5 the best.

#1 is a wardrobe malfunction waiting to happen, imho.
#2 is okay. My third choice
#3 is okay, but could read a bit frumpy.
#4 reminds me of athletic gear with the grey top.
#6 is nice. It would be my second choice.

My personal favourite is 5, followed by 2 and 6. I do think 5 is the most practical though

4 and 5 are my faves

Yes, what is the target use? Even for the younger and more daring, necklines seem important if worn for MOTG, as opposed to standing languidly by the pool with drink in hand, unless you layer over a T. #1 is too cocktail. #5 has the best neckline but the waist is so-so; love the fun print in 2 and I like the slit hem in the gray combo.