I like the last two, not crazy about the first two. The first one is too peasanty for my tastes, and the second one I'm just not crazy about. I don't really like that neckline- I had a bunch of plain tshirts with that neck in middle school, so now maybe I'm burned out. I really like the third one and think it would be great on you but I think its sold out? I thought I saw that it was when I checked it, maybe its replenished now.
I'm not really crazy about the first two. The third one looks like is has the potential to be really cute but might also make the wearer look pregnant depending on how it fits. I like the last one a lot.
I don't like #1 and #2. I am not into the peasant top at all. I'm also totally burnt out on those notch-neck shirts from back in middle school/high school when they were popular.
I think #3 and #4 would look awesome on you though. You should definitely at least try them on and get them it they fit well.