Loved Nora Roberts three sisters, etc.

Any suggestions?

Garden Spells by Sarah Addison Allen? 

Christine Feehan's Drake sisters series?

Shirley Damsgaard's  Ophelia and Abby Mysteries?

What exactly are you looking for? Romance? Cozy?

Kim Harrison's series is really good and fun.

There are witches in Kelley Armstrong's Women of the Otherworld series.  Some books feature witches as the main characters, in others it may  werewolves, necromancers, etc.  Overall it's a great series.  Although, I would agree with Jamie's recommendation of Kim Harrison' The Hollows series, which is one of my favorite series of all time.

Check into the Archer Beach series by Sharon Lee: 3 books so far, Carousel Tides, Carousel Sun and Carousel Seas (from first to last)

Also, another series by Melissa de la Cruz, 4 books (I think) starting with "the Witches of East End," (not to be confused with Witches of Eastwick). This series needs to be read in order, Sharon Lee's are more stand-alone, but in order helps.

Also the new series by Jacqueline Carey, starting with "Agent of Hel,"  (the scandinavian goddess Hel, not the biblical "hell") it's light, set in contemporary times, stars a young female half-human, half -other, who must deal with a other-world population in the real world.

Alll are what I call urban or contemporary fantasy, set in current day, real world, but starring witches, fae/fairies, mythological creatures  and other beings, lots of magic. But no vamps or zombies to speak of. There are some romances involved, but they are not romance books. More straight paranormal, not paranoraml romance.

The Cousins O'Dwyer series is also very good, but it gets very close to the romance category, esp. towards the end.