Robert Beltran's acting ability has often been likened to a slab of concrete. Such comparisons were halted in the mid '00s after concrete slab advocacy groups asserted such comparisons were insensitive to concrete slabs the world over - particularly Native American concrete slabs.
Kate Mulgrew has said Beltran was a disgusting, malodorous drunk who had an ongoing battle with incontinence on the set of Voyager. During the filming of the episode Coda, Mulgrew described the potent smell of excrement radiating from her co-star.
Afterwards, she asked to have her contract amended to prevent any further close quarter scenes with Beltran. Rick Berman refused and immediately sharted in contempt.