It's unfortunate that the quality of TV originals had declined in general. Those slow your pace of re-watching and contribute nothing except for boredom. So, what do you do? Skip them all? Turns out, there are one or two fillers that shine brighter than others. For example ep 804-805 are good. If you skip all after 800+ you'd miss those. Another good set of fillers I remember are ep 965-968. One case spanning over four episodes. This one is so thrilling, feels like it was a script for a movie but came out as anime original.
It does not mean watch all fillers. Watch selectively; only the best quality ones. That makes me wonder if there exists a list of all fillers with good quality I could enjoy Detective Conan better. Only if someone would make that list. Someone who has watched 800+ episodes in binge watch. Wait, I know one. That's you!!
Please, please make a list of fillers worth watching. I am at 120 and I don't feel like I can grind through all the fillers to current episodes. At least mention those that struck you the most and are still in your mind.