Personally, I wish I could have several of each, but let's not forget the "mejiums". They are just the right size to sleep in your bed without being crushed when you flip over and although they may not be able to overpower an intruder, they can give him a really hard time. They can outlast me on a run and still sit on my lap. Here's to the 25 - 30 pounders who live with me.