Confirmed. I'm pretty boring to talk to and hang out with. People that I think are friends eventually start to fade away. Even my fucking half siblings, that I first met as an adult, gradually disappeared from my life after a few months of communication.
I certainly do have interests, but its boring to normies and/or they'll think I'm trying to one-up them somehow, as my topics are what many people consider "brainy" (ancient history, literature, astronomy). It doesn't help that I have a blackpilled view of the world (but I won't reveal this to normies of course). I blame my lack of personality on how I was treated in childhood: I would get smacked for things like talking out of turn, stating any opinion, or innocently having a valid question about the bible (my dumbass dad thought I was being a blasphemous little jerk). Also, any interest I had that was not related to Cuckstianity or spic culture ended being shot down and ridiculed, so I never developed any hobbies.
I doubt that I would have been treated this way had I been a good looking child --- research has shown that attractive people are more likely to be extroverted, and is clearly due to NOT being chided, punished, and beaten for speaking their mind, having certain personality quirks, or interested in odd things.
So yes, not having a personality is a truecel trait