I generally EQ for the room, the speakers and for the artist.
I find that it takes a good few days or even weeks to get the right sound.
I also use 'Spektroid' on Android phones to watch the music FFT, as well balanced tracks generally should look flat.
My most extreme PEQ is for some old PA speakers in the garage (see pic). The bass is 12" but the cabinet is 'seriously non optimal', and the treble is via Motorola bullets, very sweet treble. The aim is to scrub off stuff below 20Hz (or even 30Hz) as that's in general a waste of power and source of IM distortion.
In fact by (also) rolling my Living Room system off below 30Hz I get far more bass now, as my small (Single ended pentode) amplifier can focus on the musical content - so my conclusion is that with bass, sometime less
is more, a wildly flapping cone is to be avoided

Now Swan Lake's Waltz has the thunderous timpani sounding suitably impressive - as God intended !
In general this (pic) is my setting for a good even bass guitar and realistic helicopters in 'The Wall', good depth for 'Muse' songs such as 'Madness' and 'The Void', and also puts a nice weight behind singers such as Sophie Zelmani, 'A Fine Frenzy', Fleetwood Mac etc.
I get the 12" cones moving about 5-10mm on some notes, power is via a couple of 150W MOSFET monoblocks so it rarely clips - but 'Port Chuffing' pops up now and again, hence proving that EQ is not the be all and end all, and one day I may make some bigger cabinets
