I have used the Tyros 3 - 5, and Genos in a recording studio set-up for quite a few years now . I have an RME interface with top notch A-D and D-A converters. I play thru Genelec 40's (pristine quality)..
In general I have left Tyros's and Genos at their factory settings.. I usually record each Genos track to an individual track in Logic Pro.. I occasionally use individual EQ and limiting, compressing on some tracks. I have found Yamaha to be the most aware company of music kbds, in regarding to mixing.. An individual track, may not 'pop' out at you. But when you mix it in with 8 or more other tracks from Genos.. They blend together and are very homogenous.
I agree with all the reverb complainers. Way too much for me. And yes, some people feel they must EQ and change settings for their equipment. The level of professionalism in the EQ's limiting of Genos or Tyros is equal to about 10 years of a recording engineer's experience.. My first dozen years working in commercial recording studios. I radically EQ's everything. Usually making a bigger mess. of course speakers, and mikes were not as refined as the ones today..
Yes, you should EQ your patches to sound good on your system.
When I first got the Genos, I really did not care for the EQing of it. it sounded brighter and tinnier than the Tyros.. After a couple of months, I got used to the Genos sound, and now it seems fine.. If I plugged in my Tyros 5, I might think it's sounds too bassy now. Also bear in mind, most of us are senior citizens, our high range of earring is generally shot.. A couple of years ago, I worked in a NYC nightclub.. The difference in EQ and compression, was shocking from record to record.. So ultimately we each hear differently.
Mixing (with EQing) is an art form, in which you must make a universal mix which will sound good on a number of systems, not just your home studio.. You can EQ/mix a song, which sounds great on one system, but horrible on another.. You must find the middle ground.
But ultimately one must do what needs to be done to sound good to you..