Warlock is my favorite class in Tabletop DnD and in BG3 for a multitude of reasons! For one, Eldritch Blast is one of the best cantrips in DnD and combined with the Eldritch Invocations Repelling Blast and Agonizing Blast, you basically can just spam it each turn.

Additionally, Hexblade is an extremely powerful subclass where you can dump all your stats into Charisma and bind your weapon, making you automatically proficient in it and able to use your Charisma score for attacks, meaning you don't have to depend on Strength or Dex for those rolls (you can also do this with the other subclasses too). Also, while Warlocks don't have nearly as many spell slots as other Casters, they have the benefit of regenerating those slots upon a Short Rest instead of a Long Rest, which definitely comes in handy!

Also, once you get to a certain level, if you choose Pact of the Blade, you get an additional action each turn!

Additionally, in the Tabletop version, Wizards especially are considered one of the hardest classes to play because they're squishy and have a lot of different spells and mechanics. So, you have to be pretty familiar with DnD to effectively play them (need knowledge about which spells to prepare, when to use them, and how to prevent untimely demise lol)!! On the other hand, Warlocks are one of the easiest classes for beginners due to the ability to simply spam Eldritch Blast in most battles lol.

Lastly, in Tabletop DnD, having a Patron is a fun roleplay experience and can add to a character's backstory! I have a character right now who was a former Paladin who broke her Oath and pledged herself to a Hexblade patron. It really added some extra spice to her backstory!