When I was first a fan of Cardcaptor Sakura many years ago, I related most to Tomoyo. We were very much alike. We were both feminine, soft-spoken, and musically-inclined, and we both shared an unrequited love for our (female) best friends. None of that has changed for me (well, aside from the being in love with my best friend part - we are no longer friends and I am not in love with her), but I find now, for some reason, that I relate more to Touya.
Like Touya, I am also reserved around most people, and I share a similar relationship as he does with Sakura with my younger brother. I tend to tease/pick on him a lot, even though I'm actually very close to him, and he is as important to me as Sakura is to Touya. I also have 'supernatural gifts' like Touya. I have had many dreams of events that happened some afterward, right to the very last detail. I've also had very many experiences with ghosts. I don't remember it from the series, but there is a manga illustration of him playing the violin, and I also play the violin. However, I don't have a "Yukito", and in fact, in that relationship, I would definitely be more a "Yukito" than Touya.
Which brings me to the next person - I'm also very much like Yukito, in personality. I guess for some of the same reasons that I'm like Tomoyo and Touya. I'm soft-spoken, introverted, and I like to tease the people I'm closest to. There is also a friendly, easy-going quality about him that reminds me of myself.
Out of all the characters, I definitely look the most like Sakura, though. I have the same colour hair, the same length of hair and a similar hair style, and greenish eyes (although, mine are more turquoise, where hers are emerald green). In personality, I'm nearly her opposite. She's very energetic, outgoing, and she seems to make friends easily. I'm laidback and quiet. I'm calm most of the time... even when I'm excited, you'll hardly know it. ^^;