I love blouses with this shape that are smart enough to wear for work, but also look good with jeans. I especially like the sleeve length, and the medium body-length (I have long legs and shorter body), and the slight fitting (not too much fitting - I'm slightly apple shaped up top). I suit a collar too - rather than a round neck - although a more open collar will tick the box as much as the peter pan collar shown here. A nice print would work well too, or plain like this one.
I spend hours trailing shops, and browsing websites, looking for things that suit me. I'm hoping you lot might be able to come up with a few suggestions of where to look!