I'm curious as to which are your most common 'problems' when you speak/write Spanish.

Question

Do you mix up your pronouns? Do you have trouble with commas and their usage? Do you have issues with grammatical gender concordance? Do you struggle with "acentos" when speaking? Do you hate conjugating verbs? What makes you go, "Damn! I should've thought of that!" or "what was that again??" or "Nooo! I can't remember!! " ?

I have a really good friend who always stumbles when it comes to 'acentos', particularly with "esdrújula" words (voiced accent on the third-to-last syllable): "mágico" (she says ma-GI-co), "luciérnaga" (she says lu-ci-er-NA-ga), etc.

What are some of your problems? Thanks!