No singing required. Many wonderful, full piece musical scores across sub-styles. Beautiful sounding entertainment made for one.
Cons: Ability to read musical scores almost a must. Ability to play by sound a big advantage. Serious dedication required to advance beyond the first fret position. Typically not an instrument for a "group".
An expansive topic that can take you from learning about the fundamentals of how electrons bond atoms together to the applications of how folding of proteins make a drug more potent.
Cons: To understand chemistry well, you should have an inherent desire to understand how and why things react together at a very basic level. Success does not come from routine memorization of facts.
One of the higher paid branches of engineering with training that covers the basic aspects of many of the others (mechanical, civil, environmental, industrial, and electrical).
Cons: You must enjoy additional studies in chemistry that go beyond those of any of the other engineering branches.