Pros and Cons of Synthetic vs Natural Fiber Yarn

Should I use Synthetic vs Natural Fiber Yarn for my crochet project? Whether you are starting to learn how to crochet or you are more experienced, the range of fibers that you can use may seem confusing.

How do you determine which yarn is good for crocheting?
In general, the easiest yarn to work with for your crochet project have a smooth surface and a tight twist to prevent splitting. Here's the pros and cons of each yarn. Not an exhaustive list, but a summary of the yarn most people work with:

Natural Fiber:

Wool yarn:
Pro: Warm, retain body heat well. Idea for outdoor wear and warm accessories like socks, hat and scarfs. They can be stretch and not lose shape easily, which make it easy to push the point of the hook into each stitch.
Con: Can be pricey. More care needed for cleaning and storing wool.

Silk yarn:
Pro: They have a beautiful luster, which makes beautiful garments.
Con: They tend to have less resilience than wool/ cottom yarns and they tend to be expensive as well. Also, the texture and the way it moves on the hook may take a while to get used to.

Cotton and Linen yarn:
Pro: Durable and feels cool to wear, great for summer clothes.
Con: They tend to be not as soft as the other yarn, but they do get softer with wear. Linen feels slippy on hooks and can be challenging to work with. They also don't stretch very well.

Synthetic Fiber:

Acrylic/ Nylon:
Pro: Less expensive in general. Generally are very easy to care.
Con: Most have no elasticity so once it's stretched out, it's stretched out. Not good at retaining warmth. Some cheap synthetic fiber can pill more easily.

What yarns do you like to use on your crochet project and why?