I have had two ponds. The first was about 2 acres and round. This one we have now is awesome. It is 3 acres, but everybody thinks it is much larger. If you take your right pointer finger and curl the finger, that is the shape of ours. Our home sits on the inside of the curl, which means all 3 acres are close to the house and there is plenty of pond bank for fishing.
Honestly, a pond no matter what shape is fun. The best advise is to be sure to keep most of the pond at least 4 foot deep to help with weed & FA.