Hello Rachael and welcome Your first ever post....neat, well I guess that makes me your first ever replier! is that a word? ha
Well they are both fire signs, so there would be a natural affinity of sorts with one another. Leo loves fun, being entertained and anything exciting, to name but a few, Sag overts energy, is always on the go, generally loves sports of one kind or another and loves travelling, whether it be to distant shores or simply short journeys doersn't matter
so in essence Leo would fing Sag quite exciting with all that energy they have. However, Leo, in essence is quite lazy (sorry leo's) which is why they would like the Saggy doing all the energy stuff leaving them to simply be part of the fun without the need to excert themselves too much yet lapping up any of the attention derived from whatever it is they are doing with their Sag friend.
In the long run, these two may tire of one another. Sag may find Leo's pride a little too restrictive in certain areas - a reserved unwillingness to make a fool of oneself in public with lots of messing around could limit the amount of time they would consider appropriate to spend with Saggy
While Leo may tire of Saggies continual need to be moving, and see it as a personnal issue whereby they do not feel Sag is giving them as much attention as they believe they deserve for being so regal!
Of course it depends a lot more on other planetary aspects between two individuals appart from purely the sun sign compatability
Hope that helps a little