Your favorite expressions/words in Japanese?

I love Japanese very much, and to list ALL the words I love...it'll take some time, I'll just say 4:

どいたしまして(doitashimashite)-You're welcome. I like how it sounds.
The other two, I love the kanji-s very much, I thing they're very beautiful:
夢 (yume)-dream
葉 (ha)-leaf
And
愛してる(aishiteru)- I love you. The fact that this phrase is used ONLY when you're truly and crazily in love, i don't know, makes the sound of it more special for me.

Hachi wrote: Mine is komorebi 木漏れ日 - sunlight that filters through the leaves of trees.

I love the sound of it ^^

I thought of another favourite: 笑顔(egao)-smiling face. Isn't it cool to one word that expresses the expression???

I am using "are?" so much in my native language that my friends made a poster of my image, asking "are" (I wonder if I should be embarrassed ? guess not) well here are the words that my friends had to learn because of me...

are? : suprise , sudden suprise expression, even don't know where I learned it.
oro? : suprise, when you can not figure it out what happens. I guess it's a another form of "are" wtih a different accent. This word made me fall in love with Kenshin.
ala (well probably "ara" but sounds like "ala" :D): suprise, when you pretend like you have been suprised and follow it with an evil female laughter ho ho ho...
mendouksai: I guess the translation "troublesome" in any other language does not give the same feeling.
maji desu ka? : Really? I like to use it in the non-formal way sounding like majiska...
uso: lie, but I think it means more or like "Noooo way".
and my favorite;
aho: stupid, fool...But have to be used like the birds in Naruto...you know...aho! aho! :)

Watashi no hanimasen eigo (haven't said it in awhile so it might be incorrect)-I don't speak english
Baka-idiot
Ohayou-good morning
Sumimasen-sorry (I only say it to my lover)
Gomen-informal/childish sorry (I only say it to my dog)
Chotto-wait
Moshi moshi-hello on the phone

oh yeah..this!! Goran no sponsor no teikyou de okurishimasu
i've been hearing this forever..and i love how it sounds..so i searched it.. :)
i don't know if it could count as an expression though

Can I say "everything Matsuda Shota says in Don Quixote and Liar Game?" NO? Okay... I'll be serious. Kawaii Yoshi Mushi mush Baka! Aishiteru Hai As I get more familiar with the language I start loving the very words I used to find strange. Japanese and Korean intimidate me but much more than that, both languages totally fascinate me!

Saikou!! (iwgp!!)

very close to christmas actually LOL never thought of that kurisumasu