Liam used to be my number one name choice, until I told my husband.... he HATES it. I was really sad for awhile. However, I did notice that Liam is incredibly popular... I even saw a few websites that listed it as the number one name this year.
I would personally avoid Jacob like the plague because of Twilight.... it's also super popular.
I like Ethan a lot! But I would probably still name my DS Liam if my hubs would let me.