Hola Callan, As a very general statement, me gustaría would be used over the quisiera almost always here in Costa Rica and probably most of Latin America. Quisiera is more commonly used in Spain. Here it carries more of a command quality than just a statement of desire or what you would like. Your "Por ejemplo:" statement here would come across very heavy-handed or demanding. I wouldn't advise that structure if you are inviting someone on a date, for instance. Let me know if this helped. Cheers, Ellen

Sí, totalmente puedes decir "quisiera" para invitar a alguien a cenar de manera educada y cordial. "Quisiera" está en el imperfecto del subjuntivo, y una de las funciones de este modo verbal es la de cordialidad. También puedes decir "me gustaría", ambas formas equivalen a "would like".

Si, ambas opciones son correctas.

sí