Right here we go proper eval time....I'll be gentle and you can just ignore me like usual
Homepage:
1st thought... lots of white space on my 1920x1080 display, maybe too much for my tastes.
I would like to have seen a larger slideshow as that is in essence a key focal point on the homepage.
Wants to click on graphic/web and icons as said
Typo - One size fits all - 'we can deliver'... actually might want to reword that, you're basically 'first person' when you say who you are but you're on about being an agency here....
About:
When on split screen (959x1050 according to browser) the 'tabs' overlay your text slightly
I'm not sure you need the 'history of your first pc'
not sure this reads well 'I find little else as exciting as introducing a client to their new brand!'
Me as a designer - 2 favourite types of work... maybe remove favourite and make it something you enjoy doing...
Me as a developer - I'd remove completely from 'completely fluent' and I'd change basic to modest or similar (it sounds better than basic). Too many ands too, needs splitting up
What keeps me busy - again, not sure you need your life story but I'm assuming you're using the 'personal' approach. Might need to expand the tennis bit, the change from tennis to cycling seems a bit forced.
My life in four paragraphs - remove anything about grades etc, this is not a good thing to have on a website, let your work speak for itself, grades mean nothing.
Work:
Tabs overlay again - needs a bit more of a margin on smaller screens
Personally I think the whole 'overlay' should be clickable
Pricing:
'here you see the minimum prices'... maybe change it to remove minimum, you've got from in each one...
Project Pricing Info - Not sure you need the first sentance, it's just repeating stuff again.
Contact form - do you want someone to send you a random email to test it?
All of site:
Did you consider a 'sticky menu' so you don't need to scroll up for the menu