Many an adventurer would attest that the best fight is one that leans heavily in your own favor, and everyone knows the best way to stack a fight in your own favor is to simply pick an opponent that you can handle with ease. Of course another general rule is that looks aren't everything. And while this is a good rule to follow, by looking for the right things and using a good amount of discretion and judgement, one can sometimes get a fair estimate of a potential opponent's ability. Being able to look for the right things, beyond that first glance, is an art.
Notice! The consider skill compares the target, among other things, to your personal top solo kill, which will affect the outcome. You can change your top kills via 'top10' command.