My teeth are straight but for some reason, I still really hate the shape and size. Any suggestions? (Photo)

Based off of these photos it seems as though your teeth seem "short" aka almost as wide as they are tall. Teeth should be taller than they are wide to make a pleasant smile for most people. Often teeth have this appearance due to clenching and grinding or excess gum tissue. From these pictures it looks like you may need a slight gum lift. Then if you are still not happy you would consider veneers to change the shape, size, and color further. You need to find a dentist to do an aesthetic consultation, take photos, and perhaps do a mock up of what you smile could look like.

you have two options,the best one is to do braces and to bring that bite to a correct position,the situation is that at the end you will have a good oclusion,but you will still have the same teeth,with the same shape,size and color,and it will take up to 1 year aprox.now if you do not want to have braces or having braces is not part of your plans,you can have a different alternative solution,which is Smilemakeover,where you will be having a full mouth change in just a couple of days and change your life!,and you will certainly will have also good results with several techniques involved,and you will be changing shape,size and color.