When you look at her from simply a follower aspect, her amount of random dialogue is on par with Mjoll and Teldryn as they also comment on a wide variety of places/things and she has repetitive dialogue when not around something that triggers a specific comment, the same as every follower. I don't consider her complaints about the weather to be "nagging" but I find it amusing how her constant complaints are somehow less tiresome to most then Mjoll telling the same story over and over.
I bring up Mjoll and Teldryn when discussing her as a follower because I view them all in the same light in regards to having more to say then most followers (and in turn more interesting followers then most) but she stands out as the most annoying of the 3 because of the constant reanimating of corpses. Even if she didn't cast that damn spell then I still would prefer other followers because her doing random things (which don't make much sense) doesn't make her more interesting imo.
It all boils down to opinions though.
I must be missing a joke because I'm not a fan of hers and I only compare to her to other followers in Skyrim...personally I think armored trolls are more interesting as followers because they're friggin trolls and don't annoy me like she does