Not long ago I also thought the SaGa series was a waste of SE's time. I used to think if SE can release SaGa games to the States why the hell have they not translated Front Mission 5!
That was before I tried both Unlimited SaGa and Romancing SaGa. My view on the SaGa series changed. Instead of "a waste of time", the SaGa series is now one of my most loved series. The battle system in SaGa games are extremely unique and fun; the non-linear gameplay is quite refresing after playing way too many linear RPGs -- the way the quests are triggered are similar to old-school RPGs on the PC (Ultima series) where you have to do a bit of thinking and detective work; battles remains exciting and challenging through out the entire game -- random battles can destroy you at any moment; multiple characters to play through, to allow for different views of the overall story and character developement... there are many more great aspects, you should go and find out for yourselves.
While I like Romancing SaGa, I freakin' LOVE UNLIMITED Saga! It has become one of my most loved game ever since I discovered it about a month ago! It has so many awesome and unique gameplay elements in it, it truely deserve it's title "UNLIMITED Saga".
If you haven't try it, and you are old enough to understand why paper D&D can be fun, that you enjoy using your brain once in a while, that you enjoy a good challenge, then you really have to go and read up about USaga... there are no other RPGs I have ever experienced quite like it -- even Romancing SaGa pales in comparison IMHO.
However, if you think USaga is a bit too "Hardcore" for you --
http://www.u-saga.com/
then you should try Romancing SaGa, it still have a good SaGa feel, without the abstractness of USaga.
I am so glad to hear others that loves USaga here, I feel less alone.