No, that doesn't work.
"Memorable" does not mean "I remember".
"Memorable" means "the kind that people often remember for a long time".
So a "memorable event" is an event that many people will remember, for years.
If you want to say that you still remember something, say:
Yes, good, so depends which comes first--the banquet or the person (who think it is impressive), if it is the banquet, since it is a past thing, so it must come with "was", even though "memorable" is something current:
The banquet was memorable.
And hence for all past events/ people, even though the compliments (i.e., "memorable" here) are current, the events/ people must be followed by "was" since the event IS NOT HAPPENING NOW.
And if "people" comes first, since their act of remembering things is "current", so the corresponding verb must be present, and hence:
"Memorable" doesn't have to be past. Instead, "memorable" always describes the event. But the event can be in the past, in the present, or in the future.
Yes, I know it is not necessarily "past", what I refer to is the example (the "2010 banquet" example) I gave above. I mean whether to use "is" or "was" depends on the event--happening now or happened in the past, but does not depend on the adjective" memorable".