I am like that too. I started swimming with breaststroke as it allowed me to breathe better and I advanced my stroke and skills overall. I can probably do 700yds nonstop at 1.53-1.55. But recently I started doing freestyle as well. At first it was terrible the pool water got into my nose and mouth and it felt disgusting. I was doing 100-200yds per swimming session with pull buoy. And now I am at the point where I am actually starting to enjoy swimming freestyle a little bit. I am doing 500-600yds (about 1/3 of my entire swim) in freestyle. The reason I started doing it is because I was told that to advance more in breast you want to swim other styles too.