Questions in Game Dev

What game engine is best for making games by your opinion?
Is it's normal that a game developer make games for game jams only?
Guys, I have an important question, my game is in the start, so I can change that.
You like if my game have just battles like Soul Knight, Bullet Bunny, or something like that, or have something like old RPGs with shifts like Pokemon?

If I make a new page for this game you guys are going to follow it right
Should I either make a new page for the teaser game or upload it here?

Lately, we've been experimenting a lot, and we've come to the conclusion that we are in love with the graphics we grew up with.
So, we tortured our test guy!
Does his face look like ps2/GameCube graphics to you?
When should I fireside?
What i will make first in my game?