Aww, I voted wrong.. I meant to vote for the New Testament.
The epistles in the NT for one are far shorter than a lot of the books in the OT, they're only comparable in size to the minor prophets (and Jonah and Daniel). That's helpful because it's far easier to read like Galatians (6 chapters) over and over again than it would be for like Isaiah (66 chapters). The theology is also pretty interesting to me, it's nice to read about which combines well with it's size for me to like them better. The OT isn't exactly bad though, some books like Isaiah or Psalms (a beautiful book for giving praise to the Lord) are amazing books and rich in content. If anybody here is lacking on the OT, I encourage you not to get put off by size and read it.