Floating...is this ever a good idea?

[Christian_Peters]

I'm basically brand new to NL and I love it, it's maximum fun and maximum profitable.

Anyway, I've been trying all different sorts of plays and something I've done a few times is this thing called floating, or at least what I think floating is - correct me if I'm wrong.

Anyway, the situation is thus: I'm in late position with AA, and a non-lagtard raises anywhere ahead of me. All fold to me. I just call. It's a trap, and I plan on getting the money in typically on the turn. I haven't done this too often but I seem to stack a villain about 1/4th of the time I make this play. Is this a winning play or am I just getting lucky? And if so, are there some suggestions on when it is better to do it/ how often should it be done?

txs
C