Well we all know and love Mcmmo from servers. I indeed love it so much I've been looking for ever to find a mod just like it. I found some but they are always out dated. I don't wanna have to create a small server to have fun. I wanna be able to play it with single player. So I'm asking if anyone could possibly create one you can add more skills then what mcmmo has to offer. I have some Skills Ideas myself.
Running: Higher levels decrease the chance of Hunger loss.
Swimming: Makes you swim faster as you level higher.
Alchemy: Making potions. Higher levels get higher duration Potions.
Armor Smithing: Make armor Higher levels can make better armor w/ better duration.
Weaponsmithing: Same goes as Armor smithing.
Cooking: Raising cooking decreases the chance of burnt food.
Enchanting: Higher levels don't have to spend as much xp.
Other then Levels I think that there should be added npcs. But added to a town. When you start your freshly new minecraft world. There will be a town nearby which adds npcs which can help sell items for those skills. You can also sell your items to npcs in the town like at a merchant. There should also be a bank system too!
Well that's all I have as an Idea. If you wanna make a mod like this please message me or leave a reply.