I like to switch it up, with my morning coffee its 2.1, no center channels. When listening to music that is most everything else I upmix to 9.2.2 (just engaging my front height speakers and wide speakers are KEY for most music reproduction). When listening to bass dominant music like you hear in a club (house music, pop, hip hop) and classic arena rock I go full immersive 7.2.6. The 9.2.2 (with wides) setup presents music like it is being played in front of you like in a jazz club or concert hall. Full on immersive is more like a night/dance club or stadium when using an upmixer.
Music specifically mixed for atmos I listen in atmos 7.2.6.