I always liked the frames built with the French Nervex lugs.
They were pretty ornate, for an off the shelf lug set, without being over the top.
The late 50’s/60’s Schwinn Paramount frames made good use of this type of lug set with accents in chrome.
I always liked these lugs outlined with pin stripes, but some of the European builders frowned on this, because it was said to be a way to hide sloppy finish work.
I disagree, and tend to think, that it was just too tedious of a job, and a way for them to explain why they didn’t pin stripes their lug work.
Ornate Lug built frames are magnificent things of beauty, and will some day be highly collectible.
Or at least, they should be.