I have noticed that the default recordings in BIAB seem to use a +6 dB per octave slope (which also seems to be the slope a lot of jazz music use. Also, the Yamaha synth I use also defaults to about +6 dB per slope. And even some rock-recording multi-tracks I have remixed was delivered at +6 dB per octave)

Meanwhile a lot of modern pop (mastered for radio) seem to go for a slope as bright as +3 dB per octave.

For a long time I used +4.5 dB per octave for my own music, but have lately tried mastering a few at +3.

Personally I find +6 dB too dark for my taste, but not being as young as I was I'm wondering if perhaps my ears are just losing their ability to hear the bright frequencies as good as they used to.

Which slope do you generally prefer?
+6, +4.5 or +3 (or something else perhaps)