I am more or less in the same situation in the set theory sub-community where there are some very well-informed colleagues who can provide really high-quality answers to almost every question that I can answer. I also tend to ask many questions there.
Based on my personal experience, MathOverflow community is mostly concerned about the quality of users' contribution (i.e. research level mathematics) rather than its quantity (i.e. the number of one's posts) or type (i.e. the question, answer, or comment). That is why almost everywhere on this site you see guidelines and comments encouraging people to post as high-quality stuff as possible rather than rules dissuading them from asking many genuine nice questions. Note that:
Nice questions are in fact the main source of generating high-quality material on this site as there will be no informative answer if there is no one to bring up a related interesting topic in his/her question.
Many high reputation answerers strongly encourage those active community members who provide nice questions, particularly because it allows them to share their knowledge more easily. This happened to me on several occasions when some users of high standing gave me public or private compliments concerning some of my posts.
If you are in doubt whether the other users are satisfied with your contribution style, you may pay more attention to the feedback from the community. I personally check my vote/post ratio as an (not completely accurate) indicator of my contribution quality. As far as it is higher than 10 vote/post per month (i.e. average nice question/answer), I assume that the community is more or less satisfied with my contribution. If it drops beneath the mentioned self-imposed threshold, I consider slowing down my asking rate, spending more time on searching around the topic and even consulting some colleagues about the content of the question before posting it, in order to improve the quality of my posts.
As the conclusion, I think there is absolutely nothing wrong with asking a lot of questions without answering any if your questions are high quality enough for this site and if you are able to be always nice and respectful towards other colleagues who may express some critical views towards some of your posts. Good luck with your contribution to MathOverflow! :-)