This might be a touchy subject for several reasons.
First, as I understand it, the notion of a motivated delusion is on the decline among most people studying/treating delusion. Other models to account for the rise of delusion have gained popularity, though for some delusions like erotomania, motivation still seems to be a popular explanatory factor. (Although I personally think psychodynamic and neuropsychological accounts of delusion operate at different levels (reasons vs causes), this is beyond the point here.)
Second, the more obvious point that makes the issue touchy is that it can be taken to put blame on the patient for his suffering when one is imposing a motivational explanation of delusion on the patient. (My stance on this is that this can only be the correct interpretation of a delusion if the patient agrees with it. Again, this hinges on the reasons vs causes debate, which is not where I am trying to get at here.)
What I do try to get at is the question whether anyone else did some soul-searching during (or after) psychosis and identify motivational factors for their delusional thoughts? I found and agreed to a need to feel special that supported my delusion of a telepathic ability, which was also framed as a ‘gift’ and came with a sidestory of being ‘chosen’ etc. To find this supported by motivational factors has helped me to dismantle the delusion. For I reasoned that given this need, there might have been other means to satisfy it than endorsing this interpretation of experience. And it also opened up the possibility of working on my desires in the first place, to change character such that I would be no longer motivated to endorse this interpretation.