A myth I often hear about dialogue is that it should sound like real life. No, it shouldn't. Great dialogue sounds like the way we wish we all talked. The way we would talk if we could edit real life.

I think that dialogue is only boring if the characters talk exactly like each-other. Each person in real life talks differently than each-other; they have a different accent maybe and they might use certain words or phrases a lot, or they might stutter a lot.
When dialogue becomes boring and just a necessary thing that must be in your book, then I think you should change the way each character says something so that you know exactly who is talking - without reading their name after they speak - because you know what words or phrases the characters use a lot.
To me, dialogue is important because character development and story development happens within those lines of spoken words. You get to explain something through the knowledge of one of your characters instead of 'telling' the readers yourself.

I love dialogue. It's descriptions and such that I tend to have a harder time with. But dialogue tells you more about the characters, is frequently the best place for humor, can carry the greatest emotions (I love a good argument ), and can be so very, very interesting.

Do you know why you have a hard time with it? Does it feel unnatural, you don't know what the characters would say, something else?

My dad's biggest criticism of my writing is that my dialogue is juvenile.