I have the biggest issue with plus-sized tops.. they all seem to be cut super short and square, or ridiculously long! I mean, it's not like I want to be wearing crop tops (good lord), but I also don't want shirts to double as dresses.
I've even shopped in the petite department sometimes to get something the right length.. and nothing about my body is petite, let me tell you
OH, another thing I hate (especially for the plus-sized clothes designed for younger women) shirts/dresses with skinny straps, normally done in a way that makes wearing a bra look absolutely awful. Strapless bras + me do not mix!