French defense

In french defense do you castle kingside or queenside?In my recent OTB games I tried castling kingside but that was really bad for me as I got crashed by a pawn storm in the kingside..so do you think the best way is to castle queenside?also I wouldn't consider not castling at all because I want my rooks connected 

If you castle that will make your rooks connected. I'm not sure which side castling should you go with but since the king side doesn't work for you, try on the queenside.

I rarely see a queenside castle in the French. I think you're only supposed to that in the Winawer, when you let your kingside get torn apart to get strong counterplay on the queenside. But in, say, the Advanced French, the c file often breaks open, and I'd rather have a rook there than my king. 

It all depends on the variation played:

Winawer - In the Winawer, typically it depends on what Black does with the c-pawn.  If he locks the center with c4, it's usually a sign of Queenside Castling.  If he trades on d4, Black will castle Kingside.  This is in the "Positional" lines of the Winawer (i.e. NOT 7.Qg4, instead, lines like 7.a4, 7.Nf3, or 7.h4).  In the 7.Qg4 lines, there is a line 7...O-O (which I think is Black's best, though I don't have much respect for the Winawer in general), and then there's 7...Qc7, the "Poisoned Pawn Variation", which results in about a 50/50 split of Queenside Castling and simply NOT Castling.

MacCutcheon - I think this is 1000 times better than the Winawer, and I actually played it quite a bit when I played the French for 10 years (1997 to 2007).  This has about a 50/50 split between Queenside and NOT Castling.  I had one strange game where I ended up castling Kingside around move 20 to 25, but that's very rare.

Classical - Almost always Kingside except if White does the Alekhine-Chatard attack, then it's about 50/50 Kingside to Not at all.

Burn/Rubinstein - Almost always Kingside Castling.

Tarrasch - Almost always Kingside Castling.

Advance - Typically Kingside Castling with one exception.  After 1.e4 e6 2.d4 d5 3.e5 c5 4.c3 Nc6 5.Nf3 Qb6 6.a3.  Here, Black has a number of options, 6...c4, 6...a5, 6...Bd7, 6...Nh6 being the 4 most common.  The first one, 6...c4, typically Black will castle Queenside, White Kingside, and oddly enough, Black then attacks Queenside and White attacks Kingside, advancing pawns in front of their own King even.

Exchange - This depends on what both players play.  Does White play Nc3 or c3?  Does Black play Nc6 or c6?  Does Black play an early f6?  What about Bb4 (if Nc3 by White) vs Bd6?  Did White play Nf3 and allow Bg4?  There's a lot of if this then that in the Exchange, but it's all just equal.  White gets no advantage what-so-ever in the exchange.  That said, I'd say it's about a 70/20/10 ratio of Kingside/Queenside/No Castling for Black in the Exchange Variation.

King's Indian Attack vs French - Black always castles Kingside.