"Muse" by remuslives23

http://www.fanfiction.net/s/4990087/1/Muse

You've got to appreciate a fic that includes the warning: "Sex. Oral, anal, rimming (very mild)."

This is some pretty straightforward erotica, although it's relatively well-written and believable. Remuslives does a fairly good job of using the sex in her stories as a means of character development. It's not exactly my cup of tea, but I can appreciate what she does, for the most part.

Speaking of the way she relates to canon in this AU story, I enjoyed the way she used James and Peter, and Remus's muggle parallel is very lovely. Sirius's plot, however, gets a bit lost in the shuffle and I sometimes found him lacking depth. But, like I said, this is SMUT, so, who really cares?

"A Cure For Nightmares" by picascribit

This fic is so sweet it gave me toothaches.

http://www.fanfiction.net/s/6361279/1/A_Cure_For_Nightmares

This is really just your run-of-the-mill RLSB Marauders era fic, with minor twists, but this fic is so straightforward, that I kind of respect it for that. It doesn't pretend to be anything other than what it is.

Edit: I've decided to clarify, for the sake of my reader, that this fic does deal with some touchy subject matters, and that some people find those kinds of subject matters pointless in fanfic. I typically very much agree with that assessment. However, because this fic is obviously trying to channel canon, I accept it in this case, and I don't think it's exploitative or in bad taste, but some may disagree. 

"'The Parallel Worlds' Series" by LouisaB

When I started this blog, I decided to only recommend one fic per author, and that was it. After just a couple of months, I'm already bending the rules, though in my defense, it's for an interconnected series.

http://www.fanfiction.net/s/3920327/1/Double_Trouble_COMPLETE


http://www.fanfiction.net/s/3959071/1/Triple_Trouble_COMPLETE


http://www.fanfiction.net/s/4072843/1/Trouble_with_a_Capital_T_COMPLETE

I left out one story there - "Catch a Quaffle," technically second in the series, though it has nothing to do with inter-dimensional Marauders as it does Remus/Sirius fluff. And I just don't care about that.

After accidentally opening a portal and finding a parallel universe, the marauders (and Lily!) get into all sorts of adventures and wacky hi-jinks. These fics are actually really well-written, enjoyable, and pretty damn brilliant. The different marauders running around at all times is sure to make you smile. I doubt these fics would be half as popular as they are if it weren't for the RLSB aspect, but I actually feel like that's the weakest part to the whole series.