Friendly fonts are typefaces that can be playful, inviting, and convey a sense of approachability and warmth. They tend to be more rounded, with rather open shapes and generous spacing between letters. This helps to create a feeling of lightness.
Friendly fonts typically have curves, they can have rounded edges (think of Arial Rounded) and usually don’t have sharp angles and only straight lines. These types of fonts don’t feel too formal or corporate. Friendly fonts are often loved by many people—you might remember the times when Comic Sans was used by too many people (even for professional design materials).