Perspective practise

I know one of areas I need really practice is perspective. Today I made three sketches, two digital and one traditional. The last one got little bit carried away..

the first one I made with just reading little bit from some article that I found in Google.

After I made this I found video on Youtube, which tells that amateurs normally tend to make the vanishing points too close to each other, and it makes the "fish-eye" feel to it.. Exactly what I made.. 

This is the one which I made maybe little bit too long :P

I really recommend watching this awesome guys lessons about perspective.. I still need to watch all of those.