Here is a list with different choline forms in common foods:
Phosphatidylcholine is found in high amounts in foods like egg yolk, meat or fish. Free choline is found in foods in relatively small amounts though. Certain spices, herbs, vegetables, fruits or poultry have some higher amounts of free choline compared to other choline forms.
Some foods high in free choline: chili, curry, coffee powder, basil (dried)
I notice that at times I have an increased appetite for choline-rich foods. I also think choline has some very important metabolic functions in methylation and as the neurotransmitter acetylcholine. I don’t always tolerate choline hydrogentartrate supplements well, and am unsure wether it is better to supplement choline directly or to improve the synthesis in the body by increasing methylation (-> info: choline metabolism).
I would be especially careful with choline supplements if you have high adrenaline or very low glutathione, as I think choline might aggravate these problems. More SAMe could increase adrenaline and more middle pathway function could decrease the conversion from homocysteine to cysteine to produce glutathione.