[Jorg]

I realise it's rude to immediately start asking questions without introducing myself or becoming an active member first, but my sheer frustration has caused me to ignore those moeurs. So please excuse me.

How would you say "What do you want me to say?"

I thought maybe this:
Anata wa watashi ni nani itte o hoshii desu ka?

But "hoshii" is only for objects, not verbs, right?

Is it:
Anata wa watashi ni nani itte o shitai ka?

Or perhaps it's:
Anata wa nani itte o watashi ni shitai ka?

Please, if you don't mind, explain why the answer you gave is the correct one. Especially the particles; I find it hardest to grasp them.

Much appreciated.