I was curious what are the most forgotten kanjis for others. E.g. what are the top 3 or so when sorted by review fail count. Mine are:

1) 題
2) 進
3) 泊

またね

Up until now (finished RTK1+3 about 7 month before) mine are:
佐
貨
輸

I'm curious about how it may change in, say, half a year or so...

I'm up to 1900 and something, started 1.5 years ago, and there are 3 kanji I missed 16 times ^^:

提 (box 2) => I always finish to forget the part on the right.
浸 (box 6) => The part on the right was not obvious for me on that one.
翌 (box 3) => this one I always forget if the wings are in the top or the bottom.

breakies Wrote:翌 (box 3) => this one I always forget if the wings are in the top or the bottom.

Wings are usually on the top. See here.

There was a similar thread:
http://forum.koohii.com/showthread.php?tid=3088

And this one:
http://forum.koohii.com/showthread.php?tid=2628