It seems that ontario has too many colleges and creates too many students. However, Ontario, especially Great Toronto Area, are the most developed area in Canada. So we can`t simply say that colleges in Ontario are not worth to study, all depends on what major you study, and what kind of job you want to do after you graduated. In addition, if your goal is enroll into an university by transfer credit. Then it seems that Ontario is the best place, because all Ontario`s public colleges`s credits are admitted by most Ontario universities(depends on major).
cheers
zhen