Hellibors, such as orientalis hybrids, that flower on stems from the ground should have their leaves trimmed back 'when it suits you'! I generally do this when they remind me by looking untidy.
Those that flower from the leaf stalks like foetidus and argutifolius should not be trimmed except when they need it eg for diseased leaves.

Some flower from the leaf stalks and some flower from the ground ... Yes, that makes sense. I guess that would seperate hellebores into two. If I give this one the chop now, will it make the young plant grow and build up more slowly come the spring/summer, seeing as half of it is taken away?

The leaves on the plant at the end of Winter are generally no longer much use to the plant, so that is the time to remove them. It also makes the flowers more visible and leaves room for the new leaves. We will be starting on ours soon.
Leave H. niger alone, they are like the others mentioned and do not ned to be trimmed except for damaged leaves.

So the list of never-to-chop-down hellebores are Argutifolius, Feotidisima, and Niger.

they are the ones that i rarely do anthing to nless an obvioulsy dead/damaged one.

There are others too, but few people grow them and they are not easily available. H. lividus is one which should be left alone as is H.x ericsmthii.