3d6

I've got a Mountain Dwarf Aberrant Mind Sorcerer that I'm really proud of: there's a decent chance I'll get to run it at some point, but it'll be behind a wizard if I have the option.

The basic mechanical concept is that you can replace the Psionic Sorcery spells with any sorcerer/warlock/wizard spell on the enchantment or divination list, which means that you can put Silvery Barbs on your list. That means you can Silvery Barbs for 1 sorcery point as many times as you want without any components, allowing control of probabilities that a Divination Wizard can only dream of. And because Silvery Barbs is such a selective tool that you can use only when it'd make a difference, it's great to have the deep sorcery point pool fueling the uses.

You also get a scattering of general-purpose spells like Arcane Eye and Synaptic Static in the Psionic Sorcery kit that let you efficiently convert spare spell slots into reliable tools, at no efficiency loss since Psionic Sorcery spells are 1 point per spell level, exactly what you spend to generate sorcery points.

The rest of the spell repertoire are general purpose, flexible spells like Invisibility, Eyebite, Bigby's Hand, Enhance Ability, and Fireball: I went a little heavy on the concentration spells because if I've got too many spell slots I can just convert them into more Silvery Barbs. I also went heavy on save-or-suck spells since Silvery Barbs can efficiently impose disadvantage.

It's fairly tanky with medium armor and plenty of ASI space for CON since once you get 14 DEX you just need to max out CHA and then you're done.

Flavorwise, my concept is that a stereotypical dwarf miner got taken over by a mind-controlling tentacley creature, who's polite and eloquent, and that creature is the actual player. Odd-couple effect between the crude and angry dwarf and the calm well-mannered creature, built into a single character.