I mean that, not as much of a troll as you think. I am over 36 hours into the game now and have not seen a single Dragon since the one in which afterward you 'discover' that you are the Dragonborn. Now, to be fair, I have since avoided the main story and have probably spent 1/3 of my time in dungeons BUT, I know I heard Todd Howard say there would be roaming Dragons as well as the story-based spawns. I am frankly disappointed that I am level 22 and haven't seen another Dragon yet.
oh my gosh. 173hrs in now and I wish I had your problem. Everytime I leave or enter a city either by walking or carriage, a dragon shows up. I can just be exploring a new area, a dragon shows up. I have literally been talking to someone or about to do a quest, a dragon shows up. I lost count at 28 dragon souls. This has been happening to me since I visited High Hrothgar the first time. At one point, it got so bad, I was starting to get annoyed by the dragon attacks. Now I am enjoying them again, because the game is sending harder ones after me and they have varying attack styles. Up to Elder dragons now who usually end up eating me if I get to close. For the longest time, I had only completed 7 of the main quests. Now I am up to 9 with no plans to do more anytime soon. Maybe you need to complete a few more main quests.