I haven’t played many games in the Tales of series, but the ones I have I have enjoyed a lot for the most part. I’ve played through Symphonia and really enjoyed it despite the age, I know many consider it their favorite though personally that goes to Vesperia for me. I like the cast in that one the most, especially the protagonist Yuri. He just felt so different compared to so many other generic as hell JRPG protags out there (and it doesn’t hurt that Troy Baker gave a really damn strong performance). I also enjoyed the story of it for the most part, though towards the end it did start to peter out with its final act for me. Still really solid all around. Abyss is another one I loved and it’s at a very close second to Vesperia due to its great character development, most notably for Luke who is my second favorite Tales protag.
Those are really the big three I always recommend people if they ever want to get into the series. I’ve also played Graces F but I find the story and characters there to be quite poor outside of Pascal, but the gameplay to be the best in the series. Also played about twenty hours of Hearts R on my Vita. I like the gameplay of it but like Graces F most of the characters aren’t doing much for me outside of Beryl. Will get back to it at some point in the future.
All that said I think Berseria looks pretty interesting so I’m hoping that one ends up well!