There is no one-size-fits-all answer to this question, as the way you say "I like" in Polish will depend on the region you are living in and the dialect that is spoken there. However, some examples of ways to say "I like" in Polish include:
• Kocham Cię - I love you
• Ale Lubię podobne dzieła Renesansu - But I like Renaissance art
• Preferuję naturalnych produktów - I prefer natural products