Heh. I know it's not an original idea, but I was just thinking about making a side scrolling server. I started to go through the process. What time period? Future, so there'd be shooting weapons... okay, movement? Very dynamic, large areas, lots of space for skill... and as I was thinking, I noticed my avatar on another forum (Samus), and thought "Gee this is starting to sound like... holy ****!" A metroid-like server.
Obviously, I'd just use that as the starting point, but yeah, the controls would be metroid like in nature. Of course, I'd add some good rpg elements, but there'd be bosses, classes, weapons and upgrades to find on quests or for purchase. I'd even put in space ships and other planets.
I'd actually enjoy a server like that. Not my most original idea, but it would be pretty fun
Now, I don't have a server, so don't go looking for this any time soon
To be honest, if I had one I'd either make that or a turn based, isometric server. Maybe I'd make both!
One has more of a fast paced feel, while the other is just strategy.
As of now though, graal is painfully simple and similar across the board.