Some typefaces are better than others when it comes to their built-in default kerning. But lettering set in even the best quality typefaces may need some adjustments of some sort, even if it's just a slight tweak here and there. I might not worry about it if it is an inexpensive sign. But if it's something that will label a business for 20 years I'm going to put a little more work into making sure the spacing looks and works properly.
The vast majority of typefaces are made for close-up viewing, either on the printed page or perhaps on an electronic screen. Very few are specifically made for viewing outdoors and from a speeding automobile. It's obvious we have to choose our fonts carefully depending on the project. Some are friendly to things like lighted channel letters while other typefaces aren't good for that at all. When a specific typeface is chosen spacing, color, embellishments to the letters, etc. all become important factors that can either help or harm legibility.
One thing that drives me bananas with font kerning is badly spaced numerals. While most good quality fonts have acceptable default letter spacing not all that many have good optical numeral spacing for things like phone numbers, addresses, etc. Most fonts have their numerals set up for column spacing. Numerals like "1" tend to leave uneven looking gaps. OpenType fonts with different numeral sets for Proportional Lining and Tabular Lining can overcome those ugly spacing issues. Most fonts don't have that, which leaves me having to tinker with the spacing manually.
The vast majority of typefaces are made for close-up viewing, either on the printed page or perhaps on an electronic screen. Very few are specifically made for viewing outdoors and from a speeding automobile. It's obvious we have to choose our fonts carefully depending on the project. Some are friendly to things like lighted channel letters while other typefaces aren't good for that at all. When a specific typeface is chosen spacing, color, embellishments to the letters, etc. all become important factors that can either help or harm legibility.
One thing that drives me bananas with font kerning is badly spaced numerals. While most good quality fonts have acceptable default letter spacing not all that many have good optical numeral spacing for things like phone numbers, addresses, etc. Most fonts have their numerals set up for column spacing. Numerals like "1" tend to leave uneven looking gaps. OpenType fonts with different numeral sets for Proportional Lining and Tabular Lining can overcome those ugly spacing issues. Most fonts don't have that, which leaves me having to tinker with the spacing manually.