Favourite and least favourite skills to build?

My favourite is the violin skill. You really see (and hear) the evolution of the music and I like listening to it. The variety of songs your sim can play is nice too. And if your sim can sing as well, it's even better.
My least favourite is logic. I don't get why you can only build this skill with playing chess? It's just so boring to see your sim play chess all day long. I wish your sim could make mathematical diagrams on the computer or something. Or maybe drawings on a sketchbook?