I've had to take a lot of stick down the years but the one thing that really got to me was when someone questioned my integrity. It's the one thing that really grates with you.
I'm a better coach now than when I joined Celtic. The longer you stay in any job, the better you become. If you lose your drive, your enthusiasm, your imagination, that experience is no good.
I did think there were one or two referees who had a personal thing against me. It wasn't them versus Celtic - it was them against me! I just think they wanted to take me on.
The reason I became a manager was to have full control over training. If you are a coach, you are bound by what the manager wants you to coach. The other reason is that I just like the company of football people.
I've seen teams spend £150 million and get nowhere near the Champions League. It has taken Manchester City a billion to get there. There are no guarantees.
I get the feeling a lot of politicians are there to help themselves financially, first and foremost. I don't really need to do that, and I thought if I could do something for sport in Scotland, that would be really fulfilling.
Fitness is a curve. You can be Lance Armstrong, or you can be really out of shape at the opposite end. People enter the curve wherever they are and then they can move up the curve, by better nutrition and better exercise.
People think I've got a problem with the press. Actually I have no problem with the press, but just like in football there are a handful who cause problems because they're disrespectful, they're lazy, and above all - and this is what really gets to me - they haven't worked hard to get there.
I think what I've actually achieved as a manager does sometimes get a bit overlooked, because all people think about is the media side of things. They tend to forget I've not done so bad.
I like to be able to control which players I'm working with. Because it doesn't matter how good a coach you are if the guys you're working with think they already know it all. You need a response, you need to feel they're trying. I want players who are always striving to improve.
I'm afraid that this is me getting on my high horse now but we have yob television, yob newspapers, and funny enough whereas it was my mum and dad, school, police, church who used to set the standards, now it's tabloids and yob television who set the standards by which people live.
