fascinated

[ivferraz]

Can we say "stay fascinated by" or is be and become more correct/common? And is it always "by" or can we say "fascinated with"?
Thanks in advance!

[Tdol]

I would use remain rather than stay if you want to emphasise that the fascination has endured. You can use both by and with.

[etep]

It would be more correct to say "I was fascinated by" or "I've been fascinated by" or even "I've been intrigued by" or "I find basketball quite intriguing."