Leveling miner and botanist.

[FunkyBunch]

The problem is with some of the gathering, you don't know you've gathered something worthless unless you look on the MB beforehand, which can be a pain if you're leveling.
Like Wyvern Obsidian. For some reason it costs nothing on Diabolos. And Silver Ore/Ingots are more expensive than mythril. And randomly one of the gems will be worth getting, but most of the time unless you are leveling a GSM the gems are worthless too.

[Shadygrove]

The problem is with some of the gathering, you don't know you've gathered something worthless unless you look on the MB beforehand, which can be a pain if you're leveling.

I will always collect stuff when I level into different nodes then look at the MB after. Like you I had to NPC Wyvern Obsidian.