My frag count drops considerably when I hop, but it’s fun, I can’t help it. The same happens with insane combos, most the plasma balls I shoot must be exploded, because... it's fun, again.
Other guys find their joy spawnkilling, camping next to their flag to get juicy points or just playing TDM for the frag count (often 0 caps, 0 grabs, 0 assists).
If I hop, in each landing I can't shot and it's a very predictable path, we use almost same patterns, easy targets. (I get the most deaths so often)
Sometimes when I defend, I see other hop players easy preys, and it's fun (again) predict their intentions, some good aim (TDM) players tends to camp in same spots, and so on...
Finally we can get to used to all playstyles and try to counter them.