Do feel free to ask all that you wish of the Parmeshwar but then do ensure that your prayer includes the following: "O my dear God! I want You. Grant me all else that You will but 'You' I do want and that is for sure."
When we pray collectively (upasana), as a result of the confluence of all our vibrations, our prayers reach the Parmeshwar (the Almighty) with an infinite intensity.