So in the TNG pilot, Troi is shown transmitting thoughts to Riker, and while she is continually shown doing so with her mother thereafter, they backed off on that with Riker. In reality, they just didn't want to feature that on the show, but if we take it as canon, what would be some good reasons why she might have stopped?
Things I can think of...
They weren't as close as before, & it stopped working
She'd begun thinking it was inappropriate for them now that they were apart
ditto, but it was more about them being officers, & her being his subordinate
He may have asked her to, for reasons, maybe including the above
Was Riker ever able to reciprocate? Maybe he felt it was demeaning to always be on the receiving end
Things I can think of...
They weren't as close as before, & it stopped working
She'd begun thinking it was inappropriate for them now that they were apart
ditto, but it was more about them being officers, & her being his subordinate
He may have asked her to, for reasons, maybe including the above
Was Riker ever able to reciprocate? Maybe he felt it was demeaning to always be on the receiving end