75! Take a bow, please. Not many are lucky to celebrate their 75th wedding anniversary, so you should be terribly proud of yourselves for being with each other for all those years. The official theme for this year is diamond. I'd urge upon the jewelry again. A ring, a pendant, earrings or simple diamond studs. Awesome, awesome.
The first wedding anniversary is always special. The theme for this year is paper. Granted, it sounds boring when pictures of flashy jewelry, expensive perfumes and such and such flashes before your eyes, but the good news is that all these gifts will follow in the later years. For now, focus on paper and what will be a good gift with this theme. Try some Chinese paper lanterns that you can hang up over the dinner table, or a unique paper painting to adorn your living room.