actually, it's how the card works well with other cards or with himself, like, I doubt that pidgeot's quick search would do well on a 50HP poke with 2 weaknesses, 4 retreat cost and no attack (yes, I had to get really extreme to make quick search a bad poke, and my guess is that it would still be played, -_-)
but I think its strongest attack, most useful attack and body/power are always the most important, low retreat cost, a lot of HP or no weakness are always a fun extra