I'm currently formally learning Mexican Spanish in Mexico. In day to day life here it's very uncommon to hear the pronoun. The only exceptions I can think of are 'Usted/Ustedes' or 'Nos'.

Using or not using the pronoun has the same emphasis as saying to someone:

'You're drunk.' versus pointedly saying 'You, are drunk'.

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Soy Latte, por favor! (In Spanish this translates literally as 'I'm a latte. please.')