Although I find crop tops 'corny' when I see women wearing them with low-waist jeans (aka too much skin), I believe that if paired with high-waist skirts and trousers, those same crop tops can be very flattering. You can create a flirty outfit just by adding a pair of comfy heels, a small purse and a hat, perfect for a "first date" or any date!
Spring is the season that you can officially start wearing crop tops until the end of October without feeling cold. Just go for it =)