Overall I liked B5 better for telling its story, however, apart from G'Kar and Londo, character development was not all that interesting for much of the cast. Any such, like Ivanova and Marcus or Garibaldi and his drinking problems were incidental and little focused on as trials for character growth and often only serviced the plot.
Farscape was much better for character study, especially in its first two years. The overall story with the wormhole aliens, Peacekeepers and Scarans wasn't very compelling for me and I never felt all that drawn into it. Also, Scorpius, who started as a great villain, was far too overused especially in the fourth year for my tastes.