Regarding pinky rings: what several of you say about pinky rings looking fussy or ostentatious on a man rings a bell -- I wouldn't be surprised if that's why my mum didn't like them. I'm wondering if it also might be a generational thing?
The Cat, I have mostly silver rings too. I like them. I particularly like blackened silver. My wedding ring is white gold though, and I have two yellow gold rings as well. I wear them all.
Laura G, I like huge rings too! I have a giant Keith Richards skull that covers my entire knuckle. It's hilarious. It gets more compliments than any other ring I own.
Diana, I'm like you -- I have tiny pinkies! -- size 2.5 on the left side and 2.75 on the right. I had my original gold wedding ring re-sized to fit my right pinky. It's laughably miniature. (Hubs bought me a new wedding ring with a lovely diamond for our tenth Christmas together, but I had it set in white gold so it no longer "went" with my original yellow gold ring. So now I have two wedding rings that I wear on different fingers!).
Joy, it's true that pinky rings are the hardest to fit. They have to be quite snug so they don't fall off. I have this trouble with index finger rings too. Middle and ring fingers tend to have bulkier knuckles, which keeps rings from sliding off.
Echo, I like thumb rings too, although I don't own one. My best friend has one that looks great on her. She said it took a while to find one that was the right shape -- it's kind of a zigzag band. I could see how you'd have to take care to find a comfortable shape for the thumb.
Sal, usually re-sizing rings is quite simple. I've had it done a few times and it was even fairly inexpensive.
binkle, I agree that multiple rings on one hand has a quirky or "artsy" feel. I like the look, though. I just don't like the feel of rings touching each other.
Alexandra, I don't wear rings while I'm working either -- be in at the drafting table or in the kitchen. Usually, when I come home, all my rings come off and go on their shelf -- even the wedding ring!