I also will bring my foot towards their head, looking for that opening as well.
As far as that goes, depending on the throw and the person who's doing the throwing, I have to conciously make an effort NOT to kick nage in the head. I have kicked a few people before (not hard of course)
In my aikijitsu class, we frequently grabbed onto whoever was throwing us. The only acception was when we did sacrafice throws. In that case, I gladly let go to get my roll in.... unless nage refused to let go of me! In aikido, I don't do it so much, but there are some techniques that I just can't help it. Sometimes my clingyness causes me to land in a breakfall though, but I don't mind those.