ski-runabout, pontoon deck, and bass boats that predominate on Texas lakes (although there are some larger ones and hydroplane drag racers, etc). I think that big Texas DPS patrol boat was an experiment that did not last too long. The fish and game folks patrol to enforce rules for fishing licensing and limits, too.
Some holidays the traffic on the lakes gets pretty congested and a bit dangerous with booze and "look at me" behavior. Usually folks are pretty friendly and laid back just having a good time, though.