Example skills to me could be handled under the attributes umbrella. These "skills" fall under Strength, those under Wisdom, etc. In a sense a DM can even reward and encourage better roleplaying in a looser system. I'd be happy to grant an advantage if a player made up background on the spot to convince me they should deserve a bonus.Hmm....
While I prefer the "undefined skill" thing as presented to a defined skill list, I do think a list of a few example skills is a good idea. But it seems to me that part of the point of the "undefined skills" system is to encourage rulings over rules, and I'd hate to lose that.
I also agree that perception, as a skill, is an uber-skill. I LOVE the idea upthread of applying Wilderness Lore to checks to notice things hiding in the wilderness and so on.
As a for instance, let's say a player wants to get some information from the townsfolk. Bob the Paladin pipes up that he learned to juggle back at Orthodox High (home of the fighting Crusaders!) to impress maid Matilda and so puts on an impromptu street performance. Obviously, Dexterity is the cardinal attribute, and because Bob's player was thinking in character and added to the background and flavor of his character, thereby enriching the experience for everyone, I am glad to let him take the advantage bonus.
I'd much rather have that happen than someone blandly saying, "We go to the tavern to hear rumors. I rolled a 13 and my gather information skill bonus is +3. Do we learn anything or do we need to go to a different area and roll again?"