I'm a kuudere. I found expressing my feelings openly (romantic or not) backfires spectacularly on me and the target every time. Confessing to a girl I like, next thing you know, she just laughs. I tried again being honest with people I actually like, got the same result (Seriously don't know why) So,a cold approach, is what I do, and it works for me just fine.
On an unrelated note, what do you think happens when two kuuderes get together as a couple?