Deadlifts, then OHP are my worst in my opinion. However, I am curious as to how people are deciding what they are bad at. For example, if your squat is barely above your bench as KD mentions, that might seem bad, but he's got a damn big bench, so is it really?
My measuring stick is that I feel very powerful when benching and usually pretty powerful on squats and I know my form is pretty tight on those lifts so I consider them strengths. Since my deadlift is barely ahead of my squat if it even is ahead, I consider that fairly weak. My OHP is barely 50% of my bench so I think that is pretty weak, but I could be wrong about that maybe. However both of those lifts I just do not feel natural doing them. They just feel like they are so hard and I don't think my form is the greatest either.
However, all that could be perception and my own self fulfilling prophecies if you get my drift. Maybe I'm pretty decent at those lifts and just don't think I am any good.
Sorry, getting a little philosophical instead of just answering the question, but there you go. That's what I do.
I am Anton Zdravko Martin!
Best meet lifts: Sq 150 Kg (330 lb), Bench 120 Kg (264), DL 160 (352) @89 Kg (197)
Best gym lifts: Sq 375, Bench 280 (pause), DL 385 @205 or less
Goals beyond my wildest dreams, 600 Kg raw total, 200/160/240
Hack away at anything which isn't essential. Do what you love, and do it often. Fazc.
Everything competes for recovery so more assistance is not always the best idea. miked96