It's not just your questions that would be useful to have fast access to. It's also your answers, and your favorites (i.e., questions you have starred), and the list of all actions that you have done on the site, and the list of all your accounts across the Stack Exchange network, and so forth.
That's why your profile exists and why no page on Ask Ubuntu is ever more than a single click away from it. Note that you may not actually need to view your list of questions. If you specifically want to get to a recent question, those appear directly in the activity tab of your profile, which is the page shown to you when you go to your profile while logged in. However, you very well may need to see all of them. I believe you should be able to make your web browser show a clickable link to that page at all times. For example, you can place in a "bookmarks bar." Depending on what browser you use, you may also be able to pin it to your start page.
This is to say that I agree with some of muru's thoughts on this. There's just nothing special enough about user's questions that make it so that they, and not any of several other parts of their profile, ought to be linked to directly. There's no reason to think that this would justify a change that might not be useful to many other users, especially since you can use your browser to provide you with similarly quick access to the page. With that said, perhaps it will ultimately be more useful to customize the way the Stack Exchange interface is shown to you through a user script, though I'm not sure if there are any existing scripts that would give you quite what you want.