Most writers like to write certain types of scenes more than others. Some authors simply excel at action scenes. Others are phenomenal at dramatic, soul-revealing dialog.
And when it comes to dialog, some authors prefer to write certain types of interactions more than authors. Whether it's a conversation filled with snarky one-liners, or one in which the characters are professing their love for one another, sometimes the author just likes to write certain types of conversations more than others.
I like to write scenes showing the interaction between friends. Usually, there's quite a bit of sarcasm involved.
I do like sarcasm.
You can ask just about anyone that knows me and they'll agree. The ones that don't agree ... well, they're just not that bright.
But, also I like writing interactions between friends interesting is because there's often a lowering of your guard when dealing with close friends. It allows some insight into the mind and soul of a character. Readers like that sort of thing. I like to write it. In appropriate doses, of course. A book filled with soul revealing dialog after soul revealing dialog would most likely bore me to death.
At the same time, real friends often "punch up" their conversations with humor -- sometimes self-deprecating, sometimes biting remarks about one another -- and that's also an important part of the interplay that makes writing such interactions and conversations so fun for me.