Wife & I loved Babylon 5.
It was a great story told to us by great actors & great writing. While I liked some of DS9 I always thought Babylon 5 was better because of the complete story. Paramount passed on Babylon 5 in 1989 but may have incorporated some of the ideas there into DS9 according to some.
Me and the spousal unit always loved B5.
DS9 got better eventually and out of the ST later stuff liked it best.
JMS wrote a good book about screen-writing. I’ve got a copy around here. I’m sure I’d have my problems with JMS but he strikes me as at least fair and someone I could work with.