May just be listening to the wrong songs, working on mostly Youtube downloads and some small Soundcloud artists. Simple ported box, 3/4 MDF, caulked and all that, no brace though(don't think this needs it at these sound levels).
Is a higher Fs in the 40s needed to take care of midbass? Deaden trunk? Running the same 80hz 24 crossover. Might just not be listening to songs with the correct db level of midbass, and have no EQ to correct. Are you running a 30-40hz tuned box? Thinking about going bass reflex/light horn box on the next one. I know I don't have the space to even T-line a 8".