When I hear "Ruby on rails" I imagine a girl called Ruby, tied to the train rails, shouting in horror. Hence, It's a poor name selection.
Also, Ruby On Rails is related to the demise of one of the companies I worked at. They started a new project and some new employee decided to do it in Ruby. Bad idea since he was the only one in the company who was familiar with it! After a while that employee flipped out and left the company. The company had to hire some another company to finish that project, which wasted a lot of money. That started the downward spiral, which began with delayed salaries and ended with total bankruptcy.
Also I don't like that the tool for installing Ruby packages is called gem. Why pollute the namespace like that? It should have been called ruby-gem instead.
So while I don't have much idea how Ruby is good or not, I just have mostly bad experience with it. Bye Ruby!