Let me preface with three things:
I love sci-fi
I love situations where an ordinary guy finds himself in an impossible situation.
I love exploring new worlds
Farscape seemed to fit all three, that's why I initially started watching it in mid-2011. And I finished it a few days ago (with PK Wars). So why did this take so frelling long for me? It's simple: I did not like this show.
Let me break this into paragraphs.
Problem 1: Alienation of the audience.
Yes, I know it's sci-fi, and it's supposed to be weird and all. But weird has to be done right, and for me Farscape was weird in a bad way. I loved some concepts, like a living ship in symbiosis with a Pilot is a brilliant thing. The way it was presented though was not to my liking. Everything was jumbled and random, and while I know what the creators intended to do (project Chrichton's confusion to the audience), the writing style and plot structure of the episodes confused and alienated me. And that brings us to...
Problem 2: Consistency.
Now this is something Farscape writers seldom employed while writing episodes. So many "problem of the week" episodes were concluded with a random deus ex machina solution or a wildly out of character action of a crew member. And what's worse than plot inconsistencies, the character inconsistency hurts Farscape much more in the long run. The hot & cold relationship between Chrichton and Aeryn seemingly changed according to the temperature of the writing room or something - for a viewer like myself it came off as totally random. In one moment D'Argo was a fierce warrior, in the next, he was scared and helpless. There were no complete character arcs, everyone behaved erraticly many many times. This hindered my ability to view this show as a character-based experience. Speaking of characters, when characters appear/disappear/reappear at a whim, the whole universe of said work suffers (HOW IN THE FRELL DID NORANTI GET ON THE SHIP???). Which brings us to the third problem...
Problem 3: World Building.
I love myself a good 'verse, and Farscape at times looked like it can provide that. But the various cultures, races, species were only used as plot fodder in various "problem of the week" episodes, and they were never really developed. There were intriguing details, weird worlds, and I found myself longing for much much more information on a planet that the creators thought of only as a backdrop for a filler episode. Only the Scarrans and the Peacekeepers were developed, and they were not that interesting.
Problem 4: Production value, acting and all-around silliness.
There were numerous times during the series when I found myself embarrassed and asking "why am I watching this again?" after a particularly silly scene. Take for example the episode where Chrichton voluntarily accepts to stand as a statue for 80 years. I know it was explained, but the explanation was so silly I simply couldn't believe this was written, approved and filmed. Or take the episode where the entire crew gets sick, and they end up operating D'Argo's ship with his vomit. It was a clever idea, but man, it was so wacky, I questioned myself again on why I watch the show in the first place. The series never took itself too seriously, but there is humor, and there is stupidity - a fine line Farscape crossed on many occasions. In other words: anyone can do random & wacky, but few can do random & wacky well. It was just wacky for the sake of being wacky lots and lots and lots of time, creating an overall inconsistent, alienating tone.
Things I liked
Yes, there were such things. For example, I liked Scorpius in general, he was an intriguing and opportunistic villain. I loved Harvey, his mental clone in Chrichton's head (although the creators numerous times went overboard with the silliness when doing Harvey scenes), the Time-guy (aka Einstein), who embodied a much more sinister aspect of the universe (and on whom I also wanted more informaiton), the advanced aliens who put the wormhole knowledge into Chrichton's head, Chrichton's ongoing shtick of popculure references, the presistence and loyality of Braca, the masterful use and quality of puppets, etc.
A few words about Peacekeeper Wars
I liked the tone and setting much more than in the series, I loved underwater Rygel (that was great). I did not like that the peace-inducing race was pulled out of the writer's sleeve so late, but given that it was a condensed version of Season 5, it's understandable. In PKW, everything more or less connected, the production value was much higher (did I mention underwater Rygel?), and there were fewer inconsistencies this time around. If only the whole series was like this, I would have rated it much higher.
All in all, it wasn't all dren, but it could have been soooooooooooo much better. For this, I rated it 5/10. It left me cold so many times, that a few moments could not save it from mediocrity. It's a pity for me, because I really hoped it to be someting special...