Can you compare how you did the ones you don't like to your images of Kayti / crystal fashion / ginger - I think those look very good in your portfolio
I do think that the B&W images seem the worst , what that means , I do not know
Do you meet the specs for posting , if you end up with a larger file the site software might do something to shrink it again ( does the new site even do that anymore ?? )
I personally never use the 'save for web'
I do use a fuji S3 and use sRGB all the time , so I don't convert mine. but I used to have a D100 and I used to post them adobeRGB without converting , Don't think thats the problem
Are you shrinking the originals by percentages or pixel size ?
if pixel size are you using the right porportions ?
For Example :
11 x 14 = 471 x 600
9 x 11 = 491 x 600
8 x 12 = 400 x 600
8 x 10 = 480 x 600
Just some things to think about , I don't know what I'm talking about