very important to stay on the race line and be very consistent... offroad may be the same but in onroad you are going twice as fast. very important to know when to apply the gas and when to let off, also when to apply the brakes... the rush is just amazing! and then, the car setup. every thing counts. the tires have to be the right shore (very expensive by the way). the motor has to be one of the top of the line motors (very expensive again). and the most expensive motors are onroad motors not offroad. with offroad, you can get away with slower motors because you cannot really use all the power anyway. too much motor in offroad only makes the tires spin out and make the car harder to drive because of limited traction.
when i got into the hobby, i started out with a rtr duratrax offroad monster truck. i thought it was the greatest thing. i was driving it up and down the hill, jumping it, ramping it, and was speed running it in the streets. and i didn't want to get a onroad because i thought i will be limited to where i could run the car. but then after a while, bashing got boring and i got into racing. to make the long story short, i raced both offroad and onroad at the same time for quite a while, but then now i do mostly onroad only because i enjoy it more. and i only race offroad buggy for offroad because at least it got the speed, not as fast as onroad though.
if you like offroad and you see onroad racing you may think it's boring. especially if the onroad you see is one of those small races with not a lot of fast guys in it. it's amazing to see the big races a main where the cars are just so fast and the lines are just perfect it's almost like watching the speed channel. but then again, once you get into the hobby "deep" enough and understand how your car reacts to setups and installed components, you will appreciate onroad.
i don't think just because it doesn't have any jumps you can call it boring. what about dirt oval sprint car, f1 racing, and more so how about nascar??