What assistance exercises do you prefer for the big lifts?
 

Bench Press: (realized i needed to work on lockout)
-pin presses
-3,4 board press
-Dips
-CGBP

Squats/Deadlifts:
-GM
-RDL
-GHR
-Pull Thru
Since my upper back was weak
-any type of row

Bench => Close Grips, Overhead Presses & Heavy Rows
Deadlift => RDLs and Good mornings.
Squats...I have weak hamstrings so anything for hammies.

Im about the same as BTB, but I need to work on the Overhead Presses.

Bench: OHP, Dips, CGBP
Squat: Front Squats
Deadlift: Barbell Rows, Pull-ups, Power Cleans, Shrugs

Squats and deads = Good mornings

Bench, I know this isn't really accessory work but something that helped me alot was doing some speed work. 8x3 with 2 sets being normal grip, next two being narrow grip, next two wide grip, and last 2 normal grip with 45 second rest between sets, with or without chains I guess. A few guys I workout with really like the tricep death as we call it. Take a 2 board, 3 board and 4 board. Have someone there with you and do as many as you can close grip bench, when you begin to fatique without stopping the other guy slips in the 2 board, when you tire he slips the 3 and so on until you can barely get it up on the 4 board. Use a percentage of your maxx that you think you can knock out a bunch with. I haven't gotten to try it yet but it looks intense.

weighted pull-up, weighted dip (parallel bars), barbell/dumbbell row, good morning, barbell shrug, standing press, hanging pike

Bench: OHP, close-grip bench (would say dips but I can no longer do those)

Squat: Kettlebell swings (srs), GHR's, Romanian DL's

Deadlift: GHR's, Romanian DL's, Rows

Squats: Box Squats, Reverse-Band Squats
Bench: Board Press, Rack Lockouts
Deadlifts: Rack Pulls, Reverse-Band DL's, SSB Good Mornings

Zerchers are really starting to grow on me.