I felt very sorry for her. I was rooting for her to get her life straightened out and finally be happy but unfortunately it didn't happen.

Why, maybe it is fun, in dark kind of way

Me too, man. I was gutted when she became a cenobite.

I felt bad for her. She always seemed so hopeless. I wish things worked out better for her.
For Grave Encounters I'm Lance Preston.

She just wanted to dream

Her story is the same as a lot of people who summon the cenobites. They're empty, lost, looking for something to make themselves feel alive again, even something as extreme as this. She knew how dangerous it was giving into this nail-headed man in the statue, but the unknown probably just made it more exciting for her.
Agreed. Well said. Pinhead (and the rest of the Cenobites) knew who they were talking to, were tempting.
I will say though that Pinhead made the deal to Terri sound a bit less 'dark' than it was, but I would expect evil to do that.
What evil being would say "Come on, join us. Its eternal damnation."
"I'd say this cloud is Cumulo Nimbus."
"Didn't he discover America?"
"Penfold, shush."

Her story is the same as a lot of people who summon the cenobites. They're empty, lost, looking for something to make themselves feel alive again, even something as extreme as this. She knew how dangerous it was giving into this nail-headed man in the statue, but the unknown probably just made it more exciting for her. And it isn't as if Pinhead sugarcoated anything, he said he offered BLACK miracles and DARK wonders.