I have one 6" senegal and one 4" ornate in a 100gal. The senegal is always swimming around, while the ornate is almost always hiding. I think it really is just how they are, at least while they're that small.
My experiance echos the above.
I have had my Ornate now for over a year. The ornate stays mostly out of sight at all times-awesome fish that I have come to relize that he may never be as active as I would like.
My senegal is quite the exhibitionist-always active during the day, constanly swimming around....
I guess that is why most of us own more than one bicher-each has their qualities, the ornate has size and coloration, the senegal has personality and visiblity.
Good luck with your ornate, IMO their "positives" far outweigh their secret natures.