/vr/ - Retro Games

I've never played a Megaman game besides II before, but i really want to get into it after all the fun i had with similar games. problem is, there's just so many games that i don't know where to start.
I know the Classic series has 10 games spanning over the NES, SNES, Playstation, and downloads, but that's it.
How many games are in Megaman X? Battle Network? Star Force?
Which games are good? which ones should I avoid?
What's up with Megaman Zero, what's that all about? Why does Zero have giant green lightbulb tits? And most important of all, why doesn't anyone bring it up?