Matt finishes
Matt surfaces soften reflections and can make strong colours feel calmer. Dark matt doors may show greasy marks, so test a sample and ask for the recommended cleaning method.
Gloss finishes
Gloss reflects windows and lighting, which can help a darker room feel brighter. It also reflects clutter and can show fingerprints, especially on handleless doors.
Try before deciding
Look at a full door sample rather than a tiny swatch. Touch it, wipe it and place it beside the chosen worktop under your own lighting.