Corth is *entertaining* as are Rita and Blanche. Rita and Blanche also have some quests as well as other entertaining dialogues. What Rita, Blanche and Sir Corth don't pay back on is the opportunity costs of giving them valuables very early in the game when a new player is desperate for vendors, storage, and trainers.
Here's another example that may make what I'm talking about clear.
There's two NPCs that buy weapons. NPC A also buys armor, and has storage. NPC B also teaches a combat skill and a trade skill. If you're not interested in that particular trade/combat skill pair, NPC B isn't as valuable to you as NPC A. Everyone will have both weapons and armor to sell, and everyone will want storage. Not everyone wants that trade skill or combat skill.
NPC B isn't "worthless" if you don't want his skills. But, rushing to buy favor with him is a bit of a waste early on, it slows down your favor gains with NPC B.
Invest in 10 NPCs like that (not useful to you for your first month) and you're broke, skill-less, recipe-less, and confused for a month . And then you turn a corner or you "catch up", and your character has relationships with all the NPCs in Serbule and things start looking good.
The game is about exploring and having fun. It shouldn't be an exercise in efficiency pathfinding (if you want that game it's not here). But experienced players asking how people could not have money (because they have everything in Serbule unlocked) are forgetting or overlooking how obfuscated the choices are when you first step into town.
To put the topic BACK ON SURVEYING and easy/hard starter skills ... surveying is a core skill for anyone who wants to craft. It's not complicated to use the skill (make a map, click the map, run to the dot, click the map again). But, stacks of paper and ink are expensive for a new player and it's a little complicated as far as figuring out how to budget for it and how to sell the metal and gems profitably.
Leatherworking is an easy skill . Kill the pig. Skin the pig. Rub the pig skin with extremely cheap tannin. Sell the leather roll to Therese. That's an "easy" skill for new players to get into.