seeing that I enjoy Swarm, I'd probably like Baron when/if I get to ride it (big emphasis on the if)
I actually like Thirteen (too), yes it could be better, but I still find a great family thrill coaster with a decent chunk of effects and theming.
Of course, I try to leave judgement until I've actually experienced an attraction, even then it might need several rides on something to get an opinion, like how on my second ride on Valhalla made it go to the top of the top 10 UK dark ride list and in my first three rides on Smiler the ride went from no.1 to 5th and then off the top ten altogether.
From what I've seen and heard, Efteling isn't a park renowned for leading innovative rides like phantasia, Europa or even (to a lesser extent) Alton Towers, but one that's full of charm, history and creative quirky themes and stories. I'd ride Droomvluct, Vogel & Fate Morgana anyday.