Question for native Spanish speakers

Hi, whether you're from Spain, Spanish speaking LATAM, or just speak Spanish very fluently, I would like to ask you BB and BCS fans the level of fluentness of each Spanish speaking character in the series; I speak decent Spanish but I am unable to spot accents or eerie flows (beside Gus' one) and I am curious to know if, to native Spanish speakers, some of them sound very weird or uneasy. Thanks!