Series:
Brandon Sanderson - The Mistborn Saga (First book: Mistborn)
90% of anyone who likes fantasy and has read this series will recommend it. It is just that good. A consistent world with consistend magic rules. Twists are used without derailing everything before. This author knows how to write. And excellent entrance to his Cosmere, which kind of binds all his different series together. The second tetralogy, the Wax and Wayne series, is set in a kind of wild west setting (but expanding on the existing magic rules), so it may be a bit unusual as far as fantasy goes.

David Eddings - The Belgariad (First book: Pawn of Prophecy)
This and its follow up books are quite an easy read to get started with fantasy. Eddings himself wrote in the companion book (The Rivan Codex), that he went with a formulaic approach. But he wields this formula (today you would say: trope) with skill. It feels kind of normal to follow the stories of the protagonists. You have not only the high stakes story elements which include influencing the pantheon, but also every day occurences.

Jim C. Hines - Princess Series (First book: The Stepsister Scheme)
The fairy tales end with living happily ever after. But is this really correct? Follow the princesses from Cinderella, Snow White and Sleeping Beauty as they save Prince Charming and their kingdoms. Those ladies kick some serious ass, since they are way more capable than just playing the role of the damsel in distress.

Trudi Canavan - The Black Magician Trilogy (First book: The Magician's Guild)
Magic has its rules and its societal limits. Magicians come from noble blood only. Only? Wrong! Follow Sonea as she proves that she is capable of mighty deeds, despite being born and raised as part of the lousy rabble, which aren't even allowed to dwell in the shiny city.

Raymond Feist - The Riftwar Cycle (First book: Magician / Magician:Apprentice)
Life for young Pug changes forever, when his homeworld is invaded by warriors from another planet thanks to rifts in space. Follow him and his friends, as they save (not only) his homeworld, using everything from skilled swordplay, diplomacy and different kinds of magic. In later books the focus shifts between other persons of interest, so it won't get stale.
(I personally like his writing style very much. Shortly after I begin to read, the movie in my head starts to play.)

Jonathan Stroud - Bartimaeus Sequence (First book: The Amulet of Samarkand)
Written with a younger audience in mind, this series has a more humoristic approach. It takes place in an alternate history, where different kinds of demons can be bound to the will of skilled summoners. Or in the case of the human who summoned the series-naming demon Bartimaeus, you just need a bit of skill, some luck with negotiating and one of the nicer demons.
Bartimaeus loves to boast, loves to prank his higher ups and loves to give snarky comments or monologues.
(Pick this book up in a book store or library and start to read the first few pages. This sets the tone already very well.)

Piers Anthony - The Magic of Xanth (First book: A Spell for Chameleon)
Welcome the magical world of Xanth, where puns are to be taken literally. Humans rule the land, but other entities like demons, goblins or nymphs also inhabit the world. Watch a world, where the adult conspiracy is real, magical talents can rule the land, and even connections to Mundania (a.k.a. the real Earth) exist at a specific location of Xanth (but not at a specific location or time of Mundania).
(This series has a big focus on being humorous, while utilizing a different kind of humour than the Discworld of Sir Terry Pratchett.)

Yep it is :) And yw!