I just re-started WW this week because i hadn't played in a few months, and frankly, i'd forgot what i was supposed to be doing. Anyway, i like OoT better, and i don't know why. Just the feeling is different. Thats not to say WW has let me down, but OoT is tough competition. I haven't made a final decision yet.
On to the sailing-it does get tedious. But i'd love if you traveled far and actually found huge islands to explore. Then the sailing wouldn't be so ... slow. What i'm saying is, if there were huge islands, the sailing itself would lead to great discoverys instead of treasure hunting and "look, i got 50 rupees i dont need." Then, with big lands to explore, it would be a buffer between the sailing sequences. Too many times, i went to an island, only to get what i needed in 5 minutes, then had to sail 5 minutes to do the same thing. And yes, WW did need about 2 more dungeons. Hopefully, WW2 will include bigger worlds to explore and discover, more vital items to discover, and about 8 dungeons.