I LOVE; Sebastian,Arthur,Joseph, Xander, Xavier (always pronouced it X-zavier), Quentin, Gilbert, Solomon, Otto, Elijah, Leonard are all on my list, so biased!
Tobias,Louis, Elmer, Rupert (can't get past the bear), Ezekiel, Willoughby (more of a surname now), Sydney, Barrington (more of a surnamey name too); I don't like.
Roman; sorry I just think sex offending film director)
Duke; I think of Duke ellington, not a bad thing!
I like all your girls name (again on my list) aside from Blossom (sorry, it's a cows name!) & Waverley (there is a disney show atm called Wizards of Waverley place)!
I think my favourite, at a push are Evangeline (you don't get many about!) & Sebastian (Never Ending Story!!).