It's not only about your opponent's play, but yours as well.
If you generate winning chances by opening lines on the queenside or center, then eventually you'll need to castle.
Can you delay castling to help emphasize your position's strengths? Yes you can.
Is it a good rule of thumb to never castle? No it isn't.
Hey guys,
So I have been practicing semi slav against queens gambit recently (not on this site so no games to show), I have become better at it, not that great. What I have realised is when I delay castling in semi slav defense, opposition players has almost no tactics against me (anyone else has felt this, I'm serious zero tactics when I delay castling in semislav), however as soon as I castle on king side, they have bishop sacrifices etc and many tactics against me. So it almost feels like opposition player is waiting for me to castle on king side. I can't castle on queen side because to open up my bishop I have to move my queenside pawns a lot. I'm asking is it to ok not to castle at all in semi slav and carry out a king side attack if opposition player castles king side. Anyone has any examples. Thanks a lot.