What are some good openings?

...and Black gets a big lead in development, and initiative, etc...

yeah. there is a reason why 5. ... Na5 is the main line instead of Nxd5.

I play French or Sicilian defence against 1. e4 and Italian game or queens gambit as whites.

I often face the king indian defence which I do not really know how to tackle..

If black knows the theory white needs to tread carefully. White isn't the only one capable of attacking in these lines.

"4.Ng5 is a line for people with good defensive skills" - Kaidanov

There are 90,544 Master Games in Game Explorer and a site-wide official thematic tournament that would disagree with that statement.

What makes it so "horrible"?

Uh...someone else wanna take this one?

The French defense rocks is a very very ultra solid reply to 1.e4.  It also has a lot of possible complex positions very rich in strategic struggles.

I play the Sicilian as Black when I am seeking to play all out for a win, but I play the French for sure under "I cannot afford to lose" situations.

There is only one good opening. It is an opening to whole new worlds. It is the...

I recommend this:

@macer75: Funny, but some beginners may not see 2. ...Qh4#, the "Fool's Mate".  I would rather encourage beginners and actually help them, instead of setting them up for some embarrassing failures by teaching them an opening that sets them up for the fastest possible loss by checkmate.

Well, they'll remember it more clearly if they actually lose in a game using it...

"1.e4 b5!, controlling the critical central dark squares!"

- Danny Rensch

nah it controls critical squares

I don't know many beginners who would come up with 1. f3 and 2. g4 on their own.  Most just spit out the same opening over and over again, usually the Italian or QG as White, and King Pawn Game or Queen Pawn Game as Black.  The more inventive ones will pull out the French or Sicilian. 

Therefore, I wouldn't be worried about them just randomly experimenting with f3 and g4.  So why do they need to lose with it?

Ok. Brennon Huff. Really, again with the Parham?

Ugh. Enough said.

Immortal Gladiator. Really? you're gonna say that the french is bad? Maybe you don't like it. But that doesn't make it bad. You have to PROVE that.

I recommend e4 e5 and d4 d5 openings to start with by the way. Don't get fancy, just get a playable middle game.
 

Then there is this expert on chess. We must all listen to his words of wisdom. He is full of good openings to follow:

And yet it is a very common defense to 1. e4 at GM level

That doesn't make it a bad opening.  The LSB can jump into the action later.  Meanwhile, White is going to have a hard time attacking Black's king.  

(If you're that worried about blocking the LSB, you can diverge from the mainline early and play 2. ...b6, perhaps transposing to an English Defense after White has played e4 and d4 and Black has played e6 and b6.)