I'm making a judgment based solely off his avatars, but it'd be my guess that Domon x Chibodee is the only possible ship for him, unless he somehow goes for Domon x George or Chibodee x George.
Except I think George tends to be the weakest link in the team in terms of character. Then again, my tastes have proven largely antithetical to DTL's, so I dunno.
Yeah from what I saw he tends to enjoy pretty boy characters the most, like the cast of Hitman Reborn.
Actually it's DTL's taste taht is antithetical to basically everybody else's in many areas.
As for the weakest link on the team I always thought Argo was the one who was constantly ignored.