who would you like to be your Sensei???
Individual members of akatsuki
the other kages
no madara or hashi.
so who would you like???
Probably someone like Itachi honestly. Skilled in every aspect as a ninja albeit sensing and is pretty versatile. I'd also like to end shit quickly with genjutsu so he'd be my ideal sensei. He's also deep and a loving person at times, so chances are he'd actually make for a good sensei.
Tsunade, not just because medical ninjutsu is awsome. But because she is the hokage giving me free access to the scrolls with OP jutsu without having to bypass much people. So I can teach myself things along with what she teaches.
Also to those saying Hashirama, what could you even learn from him when you can't use mokuton.