The actress and mum-of-one confirmed that she prefers sad storylines for Maria as she finds them more challenging to play.
Speaking to Take It Easy about her ambitions, Ghadie explained: "There are loads of things I'd like to do. I'd love a storyline I can get my teeth into. I've been quiet lately, but the plus side is I've been able to spend quality time with [my daughter] Freya, so it's been like having the best of both worlds."
She continued: "I'd like to play Maria being happy, but the downside of that is it's rather boring. I mean, Maria is never really happy and it's when she's at her saddest that it's the most fun for me to play her.
"I'm a bit of a sadist in that way, because it's more dramatic. It's great when everything is going right - but it's more challenging when everything is going wrong."
Coronation Street viewers will see Maria involved in Frank Foster's (Andrew Lancel) rape trial next week - hoping that the businessman will be sent to prison for his dark crime.
Ghadie said: "Frank tried to rape Maria about a year ago before he raped Carla, so I have to go in the witness box. As it unfolds, there's a lot more to the whole thing and it gets very dark."
Coronation Street continues tonight at 7.30pm and 8.30pm on ITV1.
> Coronation Street Maria to have explosive scenes, says Samia Ghadie
> Coronation Street Kevin could kill Frank, says Sally Dynevor
> Coronation Street trial shocks, EastEnders dancing, Emmerdale warning, Hollyoaks newcomer
> Read more Coronation Street spoilers and news
Watch a preview of tonight's Coronation Street double bill in the video below: