For me, it's anything by David Weber - his Honor Harrington series, his Honorverse series, his Safehold series, his Windriders series. Did I miss any?

[Holly552]

I follow Kay Hoopers Bishop series. I can re read them non stop

I've been enjoying The First Law series by Joe Abercrombie a lot. Quite visceral at times, but I like his writing style.

Moe Prager series by Reed Farrel Coleman

Gena Showalter - Lords Of The Underworld series

The Dresden Files Series by Jim Butcher
The Fever Series by Karen Marie Moning
The Black Dagger Brotherhood Series by J.R. Ward

It's either Let the Right One In or the Millennium series

[BillyM]

My favourite was Quintin Jardine's Bob Skinner Series.
Only got book #26 to go

Mine is Pendragon Series and Goosebumps Series haha

[CaptainKidd]

Picking one is difficult. Based on it being the last series that I have read more than once, I will go with the 'Harry Hole Series' by Jo Nesbo.

Dresden Files.

Monster Hunter International for pure entertainment value!

Waaay too many to choose from, but my go-to repeat faves are:
In Death series - J.D. Robb
Dark Jewels series and The Others series - Anne Bishop
PsyChangeling series and Guild Hunter series - Nalini Singh

I browsed all the replies to this post and I noticed one grim thing. It is that no one mentioned about the series of Lemony Snicket.

My favorite book series is "The Series Of Unfortunate Events" by Lemony Snicket.

[ddaflunky]

Kay Hooper, but lately they seem to be taking so long for the next ones to come out. Nancy Bush and Lisa Jackson have a good series, James Patterson with the Womens and the Cross Series and of course CL Stone.

City Girls - Patricia Scanlan