So far this year that has been the Berkley Choppo. All day every day. It just gets bit. Fishing shallow river FYI.

Probably a Keitech Swing Impact or, in the early spring, a jerk bait.  But I try not to pigeonhole myself or my baits this much.

always start with a #4 or5 mepps. silver or gold blade- yellow or white hair. use this for small or large  bass-rivers or ponds. most of the time if they wont grab these they just wont bite anything

In rivers for me it is either a regular sized rage menace grub on a ball head jig with an exposed hook, 1/8 in slower shallower water 1/4 in deeper water, a 3.3 keitech In whatever color is similar to their forage on a ball head or small swimbait head like a DJ guppy head, or a smaller jerkbait. What makes a jerkbait so good in especially small rivers is that if a fish is sitting in a small current seam, like being a boulder or lay down, you can fish a jerkbait right around that current seam for longer than you could any other moving bait and still give the bait a lot of action. 
 

For lakes my go to baits are a 2.5 inch power tube in green pumpkin, usually on a 1/16th oz ball head or 1/8th if it’s windy. Next is going to be a 3.8 keitech in whatever color imitates the forage on a Matt Allen swimbait head or his new finesse head that I haven’t tried yet but I know it will be good looking at the design of it. The last one is going to be a shadow rap, seems I can call fish from so far to come hit that thing. A little bonus one I’ll add in there is I have caught an unbelievable amount of smallies in musky baits, including some of the biggest of my life. There have been times when I have been on a great smallie bite and grab either a musky glider like a 6” phantom softail or a bucktail like a smaller bite back baits trilogy or an Essox assault single 8. Might seem like a weird answer but I have had it happen waaaaay to many times for it to be a coincidence. If the fish are being obviously aggressive, it can pay off to throw a lot bigger meal at them.

3.5 inch tube. Green pumpkin with a little orange flake. 

I’m sticking to my first reply about use of a curly tail grub. But a 4 1/2” Power Worm or RoboWorm is right there also.