Can the same character take a given feat multiple times to gain the benefits all over again?
It seems obviously stupid that you can't, but I can't find anywhere in the RAW that actually states that. The closest I get is Elemental Adept's "You can select this feat multiple times" sentence, which implies that most feats can only be taken once.
The feat I'm eyeing very specifically is Magic Initiate, which lets you add a splash of magic from other classes to a given character. If I've read online documents correctly, I can use my core class (sorcerer) spell slots to cast the 1st-level spell I gain access to, which means I could grab shield of faith, use Twinned Spell on that, then turn around and grab the bard's spell list to grab healing word and turn my sorcerer into a semi-support caster.