Saying "Only I [do X]", "Only I [like X]", and "I am the only [Y] who [does/likes X]"


I've been digging through my reference books and Google searches, but I'm not
getting anywhere with this.

For "Only I [do X]", can the subject of the sentence simply be 私だけは?

> 私だけは電車で魚を食べます。  
>  "Only I eat fish on the train."

And could that be done with an adjective like 好き or ほしい?

> 私だけは天ぷらピザが好きです。  
>  "Only I like tempura pizza."

For my final act, I'm going way out on a limb here, but how would I say "I am
the only [Y] that [likes X]?" This is the mess that I came up with:

> 「ドルアーガの塔」のことが好きなアメリカ人は私だけです。  
>  I am the only American who likes The Tower Of Druaga. (Or more literally,
> "As for Americans that like The Tower Of Druaga, it's only me.")

How wrong is all of that? Because I'm pretty certain it's not correct.




> I think your last example's pattern is the way to go...

  * **「ドルアーガの塔」のことが好きなアメリカ人は** → 私だけです

_"As for Americans that like Tower of Druaga, I am the only one"_

  * **電車で魚を食べるのは** → 私だけです

_"As for those who eat fish on the train, I am the only one"_

  * **天ぷらピザが好きなのは** → 私だけです

_"As for those who like tempura pizza, I am the only one"_

Personally, I feel like it might be better to
say,「私だけだと思います」or「私だけかもしれません」instead of「私だけです」so as not to sound too dogmatic.




> I think your last example's pattern is the way to go...

  * **「ドルアーガの塔」のことが好きなアメリカ人は** → 私だけです

_"As for Americans that like Tower of Druaga, I am the only one"_

  * **電車で魚を食べるのは** → 私だけです

_"As for those who eat fish on the train, I am the only one"_

  * **天ぷらピザが好きなのは** → 私だけです

_"As for those who like tempura pizza, I am the only one"_

Personally, I feel like it might be better to
say,「私だけだと思います」or「私だけかもしれません」instead of「私だけです」so as not to sound too dogmatic.

