It's funny, I know it's not a lot of people's favorite, but I really like Try, and more so than the original Slayers (the first season)--it seems less afraid to get deep earlier on, and some of the character interactions are a lot more interesting (Filia and Xellos as someone mentioned; Amelia has grown up a little and her interactions with Zelgadis are fun). Valgaav is a great antagonist, and I like the "angels" as well (I can't remember what they're called)--for a screwball comedy, there's some really cool philosophical debates going on in the background, a theme that picks up from and expands from Next. The comedy is still there, though, but I didn't mind the in-jokes--to me those are continuity jabs, and not necessarily repetitious (I personally get great delight in the ones about Amelia's "sister" that pop up once or twice). But it dares to get more serious, and while I think it does a good job, people who want lighthearted Slayers and nothing else will indeed be disappointed. I don't think that makes it bad.
There are filler episodes that get tiresome, but I can say exactly the same thing about the original (especially the original)) and Next.
IIRC Darkstar has a funny long name in addition to the epithet "Darkstar" (just like his counterpart Shabranigdo has some kind of title that I'm not remembering at the moment), and you have to remember in Japanese, "Darkstar" still sounds foreign and "fantastical." And at least there are far fewer fan/translator debates on how to spell it (although I'm sure out there there's some weaboo out there who insists on spelling it something like DAKKUSTAA), unlike... just about every other character or place name in the series. Oh, the Amelia/Ameria and Seyruun/Saillune and Jillas/Jiras debates never end....
Now, you want to watch lackluster Slayers, watch Revolution/Evolution-R. Sad to see the series go out with a whimper rather than a bang.