I find the little things to be the most satisfying. They show attention to detail and all tied together can make or break a restoration.
I.e. my S2000s interior was in rough shape when I got it. I replaced the carpet, floormats, shift knob, shift boot, radio door, and steering wheel. Something seemed off and when I looked closer it was the radio and HVAC buttons that needed tending too. The interior is mint now.