You should have a mix of pieces you like and those you don't. All us pianists have learned something we don't particulary like but we all play things we do like too.
This is of course true with someone learning from a child, but the situation is quite different with adult beginners. There is little need to put in things one does not like when there's no prospect of professional pianism. There will probably be some natural expansion of likes if one gets serious enough, but not everyone needs or wants that.
This is of course true with someone learning from a child, but the situation is quite different with adult beginners.
I don't see a difference in matters such as developing reading skills for instance. Even adults will be forced into reading simple pieces they might not like all in the aim to better their reading skills.
No. Not quite true. There are actually things one does as an adult "I only do this 'cause I like it" pupil, or player, that one does because of what one gets out of it in the more abstract sense. Being an adult, or indeed even being an advanced player, doesn't grant an exemption form this. Just, one hopes, sufficient perspective.
I don't see why one cannot select simple pieces that one likes instead, there are plenty around
You have to sight read something the first time anyway to see if you like it or not,
Rarely, I'm afraid...Because i have heard too much music...But for the OP this is not what it's about, because the way most teachers use the method books is that you try to memorize (or at least practice until you are fluent) every bl**dy piece in the book. I have no problem reading through such a book as SR practice...
Well we are talking in general not about your specific case. This is how it works in lessons with many students.
This thread was about the OP's situation as an adult beginner who is not feeling motivated. What works with many students is unlikely to help.
BUT - there is an advantage in being a stubborn adult pupil, and that is that you can have a dialogue with your teacher. If he/she advises you to play a certain piece which you find ridiculous/boring/whatever, you could just simply ask: "why?"