When there's question "What's your favourite Arashi's song?" I don't know what to answer. I love many Arashi song and unsure which to choose.
The first Arashi song that catch my attention is Daremo Shiranai. Maybe I've heard Face Down before it since I watch KagiHeya before I watch Shinigami-kun. However, I didn't enjoy Face Down (But I enjoy KagiHeya, tho. SO MUCH). Maybe because Shinigami-kun subber put the lyric and translation of the song in the end of some episodes I got interested with the song. And the lyric? So deep! I love that song and google about Arashi and found Believe. But ... Believe is not my cup of tea. I'm not a fan of superfast and loud rap.
Then 99.9 introduce me with Daylight which gave me comfort in my dark days. Reading the lyric in yarukizero made me interested with other Arashi songs. And ... I download many songs. Tadaima stole my heart first. I cried while listening and reading the lyric of Carry On. It's like somebody cheer me up and help me to carry on. Then One Step bring the same feeling. Furusato? I listen to that everytime I miss my mom and want to go home. Ashita no Kioku feel really sweet although it's questioning my future, which usualy makes me depressed.
It took some time for me to know Hitori Janai sa. And listening to that song ... made me feel like it's a song for me. Exaggerating? OF COURSE. I know it's not for me. But, as someone who live faraway from my family, in a town I didn't know, the opening of the song really touch me.
Which song should I choose? Dunno.