Plato was a "great philosopher", in the sense of the how philosophers tend to approach things: propose an abstract concept and then contemplate its consequences

Plato was a "great philosopher", in the sense of the how philosophers tend to approach things: propose an abstract concept and then contemplate its consequences. The initial abstraction doesn't necessarily have to be tethered to reality and in some cases doesn't need to be internally consistent (at least at the outset, sometimes philosophers will then try to refine). If you tend to gravitate towards either a mathematical thinking style or a scientific thinking style, Plato and Aristotle will probably underwhelm. (And actually you'll probably find that a great deal of modern philosophers, Kant, Nietsche, Foucault, etc. are not that much more up your alley.)