I'm new. o.o
I've been playing Phantasy Star games since the early 90s. My first was Phantasy Star 2, then 3 and 4. I didn't play the first game until the GBA collection came out.
Phantasy Star 4 is my favorite game of all time. I've played through all but the first game several times actually.
I've also played PSO and PSU offline mode.
I think my favorite thing is the blend of sci fi with fantasy and the way its so seamlessly mixed together.