Critics watch movies from a different perspective of an audience member. Some really get pulled in by the technical details of the film while others are drawn to the story. Meanwhile the average movie goer's sole concern is entertainment.
The best way to use movie critics is like a discovery service. Find several (4 or 5) whose opinions you find agreeable (and maybe a few that you don't agree). Then go look at the movies those critics liked that you have never heard and watch them.
Finally, if you have made it this far, I recommend you watch "It Happened One Night" (1934). It's a romcom with Clark Gable and Claudette Colbert, directed by Frank Capra, and it was the first movie to win the Oscar for Best Picture, Director, Actor, Actress, and Screen play. It's really good!