Please give constructive criticism and tell me what you think
:)

5/10 Some clever concepts. Some room for improvement
Constructive Criticism here:
The Sklodowska line (which I got on the back end) is a group that is valid but pretty obsure. When you've got a group you like that a bit out there, you don't have to make it doubly hard by using a maiden name (you get 4 clues, generally there should be one "easy" one to gain a foothold on a concept, and conversely no more than one very hard one).
Accuracy is important and El Greco, really doesn't fit the answer. People get bogged down, and there's nothing worse than pegging the idea, getting three of them, then covering the board to get all first names in, only to find you were right about the idea, but an answer you correctly precluded was somehow included.
On the positive side, I didn't get the Ricardo line and I found it to be the kind of clues that when I found out the answer, you have to tip your cap to the creator.

I make grids (some good, some not so much) under the name urbanbaboon. I sign all comments @urbanbaboon, which is my twitter handle, if someone wanted to have a back-and-forth discussion about the theory behind board building in real time, or in depth, or in a better conversational place than these comments.

Excellent, well balanced with enough obscure to merit fiendish but none to obscure, confess I missed Marie Curie