Too busy, too many instruments, methinks.
LoL, am I watching the movie Amadeus here? "Too many notes!"
I personally agree with that statement, though voice clips do have their place (Sonic CD, for instance).
Sonic CD, Sonic & The Secret Rings, almost any Crush 40 based Sonic soundtrack, etc.
That all did sound like a generality; there were a few tracks in Rush that did have some soul (the ones I mentioned earlier), but much like a person, you have to dig through a whole bunch of layers before you get to it.
Onions, cakes, and ogres have layers. Soundtracks do not. You either like certain songs or you don't.
And if sticking to tried and true songs means more tracks like Casino Night, Green Hill, Ice Cap, Flying Battery, songs that inspire people to do remixes that still highlight the soul and basic melody of the songs rather than add distracting horn blasts, long-winded and aimless synth, and shouting (see: 0^2 SSBB Remix) or static voice clips, then I'm sticking to my guns.
....Okay, except that the majority of remixes for any song essentially comes from older games in general. It's not because the songs had more soul. It's because the music itself is limited and thus can be worked with more, but it's mainly because remixers grew up with those songs a lot more than they did the newer songs and thus have more of a personal attachment and feel to them. You could also factor in the popularity of the game itself. Our beloved MegaMan series is the prime example for this. How many remixes of Dr. Wily's Castle from MM2 have you heard compared to say anything from MM6-8? With Sonic, I hear more remixes of IceCap Zone than I do of say Death Egg Zone, Stardust Speedway, or anything from the Adventure series.
I will never forgive that game for the US boss music.
It was weird, yeah. I still liked it though.