I think he definitely should come back. I look upon him as one of the team because of his longevity of access and the knowledge he has about ICT. Which is very considerable.
Also, he is a bright and very knowledgeable bloke ,Jock, and if his personality is somewhat different to yours or mine then there is nothing wrong with that --- so be it, variety is the spice of life and irritating people also serve to keep you on your toes. eh? So long as he is not normally abusive and/or contemptuous of other fans on here then I think that he should be very welcome.