I always enjoyed shooting .30-30 the most but I've fired about as much .30-06.
While I have done a fair amount of 30-06 shooting,most of my shooting and hunting is done with single shot 30-30's and a little lever action thrown in. The 30-30's with LeverEvolution powder and 170FN Sierras are plain fun to shoot and hit hard @2300+fps. Just starting to dabble with the 140 monoflex and 160 ftx bullets. That LE powder has changed the whole 30-30 ballgame with low published pressures as well.
Might even pull the pin on a Davidsons Exclusive model 464 Mossberg 30-30 rifle to play around with. The 30-30 is a shoot all day and have your shoulder ok at night type of round. The most fun you can have without laughing.