I don’t know that I have a favorite. I have 3/0, 4/0 & 5/0 in my box that I select according to the bait size I want to throw. I always peg with a bobber stop. That doesn’t necessarily mean I peg it tight, I just use the stop to adjust how far the bullet sinker can travel. A pseudo Carolina Rig style cheat if you will. Bullet weight is decided by rate of fall and depth.
There are many factors when it comes to T-Rigs, which is probably why I haven’t thrown them much this year. I’m just too hooked on Ned Jigs and Swim Baits this year as they are treating me well so I have not had a reason to switch to T-Rigs, but who knows, maybe tomorrow….