If you visit Odaiba and Tokyo Big Sight, I recommend Yurikamome Line (ゆりかもめ) instead of Linkai Line (りんかい線). Yurikamome Line has a great view of Tokyo bay area from the train window.
By the way, do you know that the stations of Yurikamome Line are a little more special than others? Since 2006, all the stations use the recorded voices of different popular voice actors for their announcements. I have summarized in the following picture. I also displayed anime characters played by each voice actors. (Dear voice actress lovers, so sorry!)