Without sounding too harsh, in all honesty if you want to be the number one website you really need to up the game. Your website needs to look professional so people can trust your tutorials.
How does the new theme look?
Okay here's a few things that might help:
1. Those pink ad banners need to go
2.Perhaps look at a color scheme, instead of going for only 1 color. A gradient is always nice. Look at this forum for example, you have a nice soft blue gradient, with a darker blue to emphasize the buttons.
3. Maybe use a few borders, they should help guide the users eyes around the page.
4. I think the way you have listed the categories is a bit confusing. Maybe use a drop down list as a suggestion?
These are just suggestions, I don't know how well they will work but hopefully they will help.
NB. I still don't like that turquoise, it makes it look like a really old website from windows 3.1
1. I've removed the top banner so now it's only the bottom, and it's no longer pink: it blends in with the background.
2. I'm looking into a custom color scheme.
3. Looking into borders.
4. I've actually been working on a dropdown list for a bit now and I need to look into implementing it into this new theme.
How does the new theme look?
I changed it to Ubuntu, I quite like it 
