Kohaku, I have been reading about the farming plans you encourage and I admit I like the stuff. However... I think there should exist a relatively hassle-free way to set a farm, even if less yield/worse crops/etc, and allow the complex stuff for good crops or special ones. That way you get the best of both worlds, from say...potatoes (random example, it might not be appropriate) being almost as easy to set as the current farming (emphasis on "almost"), and more nutritious/better yield ones requiring to put some work, and awesome special ones (like those gem yielding crops you mentioned in this or other thread) requiring even more care and preparation.
If it's balanced towards how complex you want it, then I welcome it with open arms. If it's more complex, I want to be able to obtain big "rewards" for taking care of it, or just be allowed to sort of half-ass if I want (at the risk of happiness drops or non-optimal food yields, but enough to keep Urist from starving).
A proper interface should be proposed as well as the mechanics change. If we all think about it beforehand, it might get implemented in the optimal way (and using less of Toady's valuable neurons), making the complexity easy to use (note "to use", as in interfacing with it) so it doesn't feel like homework, would make it welcomed by many possible detractors.
I am personally looking forward for fruit trees and stuff like that. I find the problem with farming is to have almost cloned crops that do mostly the same things saving for name. Give me a system that allows great things and I'll be farming to the point of obsession. Fruits, berries, legumes, with varying market values, functions, and possibilities...something worth the potential effort (as in more than "the required effort") will make farming a solid metagame. 100 identical I-can-use-any-of-them-in-the-same-context crops are a no-no. And I damn love that idea of the gem-bearing crops.
Suddenly thinking of crop functions...it can be interesting to allow certain vegetal lifeforms to be grown as a crop. From small vegetal-based creatures to "tree people"... Weaponized farming? Maybe some sort of crop that can be used as actual weapon or in the weapon industry...or poisonous crops that can be used to mass-coat weapons in poison. Giving farming more roles than food and textile industry can make it a really useful thing to spend time into.