Alexander - I like it. It really is quite a strong name.
Riley - Loove the name Riley, I hadn't thought of it for my own list (that I'm making for #2, whenever he or she decides to be conceived) so I'll be stealing that
Lucas - Not such a big fan of Lucas, it's nice though.
Samuel - Don't tell my husband, but the reason I don't want to name our pet mouse Sam is that I want to name one of my sons Samuel.
Charlie - Nah, too plain for me, I think. And what if Queen Liz pops her clogs sometime soon and people think you've named your son after Prince Charles?
James - Again, too plain for me. Plus DH's boss is named James

More names you might like:
Scott - Bit obvious why I like this name, but I swear, I liked it long before I met DH!
Jake/Jacob
Gavin
Brent
Lance
David
Warren
Kenneth/Kenny
William/Bill