Tough question because Art is so diverse. I have categorised the activities for ease of answering:
Sketchig: HB pencil
Line drawings: Rotring disposable pens - 0.3 and 0.4 mm
Painting: Acriylic paints on canvas or paper
Sculpture: Plasticine models followed by fibre glass moulds and casts.
I don't like oil paints because they take too long to dry and give an odour for months on end. But when restoring a damaged oil painting, one has no choice.