I think Trump is a higher risk higher reward president than Obama. Other than healthcare legislation, Obama had few large initiatives that he accomplished. He was most popular in his honeymoon phase and during the final year of his presidency once he stopped doing anything. Leftists love some of his positions and small moves but many of these were not even meaningful changes in policy but changes in attitude. Trump on the other hand is going to try to be bold and do big things. If he is successful, he has the potential to do some great things. On the other hand, if he fails he could cause many problems. Obama was very safe.
I generally agree with what you're saying. My perspective is that Trump could have some successes, like an infrastrucure bill or increased investor/buisness confidence. But, I think these will be outweighed by negatives. For example: healthcare reform problems, environmental neglect, risky foreign moves, and escalating racial/regional domestic tensions. In addition, it seems like we are due for a recession over the next 4 years.
For those reasons, I voted no. Stability is underrated.