Some people get a little rush, and others don't. It's not like the IV rush, although iirc you haven't IV'd so the comparison doesn't mean anything.
Also you are likely past the honeymoon stage with suboxone. When using it recreationally it loses its magic pretty quickly, and most people get a proper high from it a few times a month. Another issue may be if the suboxone is causing constipation there may be less room for it to be absorbed.
Try it again after a break and see if it happens, but again I don't see many people raving about the rush from rectal administration of suboxone. Even with IV use the rush may only occur for some people after a break, so don't expect miracles with plugging suboxone if you are using suboxone, heroin, or other opiates/opioids regularly.