3. The oversized all in bet (e.g. Going all in for $50 into a $25 pot).
I would suggest that it is a bad play if you are making these oversized all in bets every time you flop, turn, or river a strong hand. You are losing too much value with these wild bets. Sure these bets get paid off every now and then but the money you would be making with good value bets will be more profitable to you. Of course if you are able to play an aggressive style and get large bets paid off it can be an effective strategy but if you are only making these bets when you have monster hands you will not get paid off enough to make it profitable. Improve your poker game.
Don't be a Poker Fish!