Woohoo.  Time to gush about my favorite.  
How/when you got to know her:  From when I first discovered AKB48, and was watching videos on YouTube. She caught my eye in pretty much everything she was in.
My favorite thing(s) about her:  She is absolutely gorgeous. Her dancing is extremely sexy. Her hair makes her very easy to find in group shots during concerts. Her voice. Pretty much everything about her. (Did I mention that I'm a major Tomochin fanboy).
My disliked thing(s) about her: Absolutely nothing.
A memorable performance: Natto Angel at the Budokan concert.
A moment that made me laugh: The "snowball fight"
A moment that surprised me: What the heck was she doing cutting logs with an axe?!? She could have hurt herself.
A picture that I like: Just about all of them 

 She looks very nice in her River outfit:  
A video that I like: This one someone put together for her 17th Birthday: 
[OPV] Itano Tomomi 17'th Anniversary  It's a great collection of footage.
Other comments: I could go on about how much I love Tomochin all day.  If I didn't mind missing work, that is.  She is my absolute favorite, and I don't see that changing anytime soon.  

Edit: I'm surprised Masa didn't beat me to the punch on this one.