The Silent Realms weren't repeated unless you wanted to repeat them on the speed trial, same for the bosses.
The swimming worked fine, I admit it wasn't as fast as TP and sometimes dolphin diving at the wrong time would fail, but if you actually took your time and swam like a normal hero might then it worked perfectly.
The tadtones... If I had to have a problem with the game, this might have been it.
Personally I've loved something about just about every Zelda game that I've beaten...
LoZ- Didn't like it.
TAoL- The music, the large world, it felt dangerous...
Alttp- The game had an amazing story and world. Possibly the most adventurous game.
LA- The music, and Marin. I liked her... She should come back in reality.
OoA- The overworld was cool and so was the era changing.
OoS- The season changing was awesome. And the music was pretty cool. Had some epic dungeons.
OoT- Well... great memorable story, and characters, there was really nothing I disliked about this game.
MM- Everything was GOLDEN here. The dark atmosphere, the epic storyline... the forms, the masks, the DREAD, the sidequest focus, the mini dungeons before each real dungeon, the soundtrack... (My favorite Zelda)
WW- Eh, nothing really bad here. It wasn't my favorite but it did have the best music and the second best combat system.
MC- Pretty fun game, it was easy most of the way but pretty confusing to be honest. I liked the new town and Vaati is a cool refreshing new villain.
FSA- Fun if this counts as main series. I liked the multiplayer feel even though I never played MP. If I still had it I can see myself playing it again.
TP- Epic story, somewhat gritty realistic approach and it made the game feel.... grand. This is my favorite graphically, also I loved the way Hidden skills were implemented. My favorite combat and item usage system (GC version at least)
SS- I liked how the story made it feel like you were just a normal person evolving into a hero. The music was okay but nothing special compared to other Zelda games. The item usage was amazing, it actually felt fun to use them. Combat was the most challenging (almost died on hero mode.) It was the longest game to beat for me on my first run. Only real problem I had was that it wasn't open like the other games, and only had one town.
I really wish they made TP instead...