andintothefire ThatsMyStapler gandalf456
I can only speak from my own experience of course. I believe I have had it a lot longer than I have been diagnosed for, I was diagnosed about five years ago now. As a child I had issues, particularly with contamination so for example shoes were dirty, therefore floors were dirty and consequently anything that had touched the floor was dirty. The effects of this meant I was unable to put on my own shoes for example, the anxiety and stress it caused me where massive. I dealt with it with an excess of hand washing, until they would bleed actually.
As I got older my fears were to do with my own actions, so I was scared I might flash in public for example, or have a thought about someone dying and I had compulsions to deal with that (touching wood, washing hands, a compulsive shake of my head). It was really distressing, I would stay awake all night to avoid sleepsleep walking and causing harm, I didn't leave the house to avoid triggers, I wasn't eating food that didn't come in a packet etc. I was a horrific time.
And that's only my experience of an illness, one I have fairly mildly. As in, five years since diagnosis I am able to, mostly, control it. Their are still things that bother me, but I think most people wouldn't notice. Lots of people experience it differently, some people don't have compulsions or at least not physical ones. It can centre not around cleanliness or the ordering of items, but around causing harm to people etc. OCD-UK list them as: checking, contamination/mental- contamination, hoarding and ruminations/intrusive thoughts. Part of the reason I feel that using 'a little bit OCD' is harmful is that it reinforces the idea people have of what OCD is, which often doesn't take into consideration the full spectrum of it, and its very difficult to come out and tell a medical professional about!
I wouldn't describe myself as being 'a little bit OCD' though, I have OCD.
andintothefire as I said I have mine more under control these days, so I would say it is possible yes. Plus, my theory is that the focus will change as you get older too, so you might have had fears and compulsions around, I don't know, clowns? as a child but as you get older this actually manifests as fears around driving. I don't know if that makes sense? That's just my thoughts on it. OCD is an anxiety disorder, the way it is differentiated from anxiety is just how much time is spent and the impact on day to day life, which isn't an exact science. I would probably juist explain that X makes you feel quite anxious, and you would rather do it yourself/do Y. If you really couldnt deal that is, actually I would advocate working through those anxieties :).
ThatsMyStapler as I said before, it would depend on the time and why. If there was a reason behind why they wanted their paperclips that way, is they had a sense of impending doom, something bad would happen, etc and it caused them a significant amount of distress and anxiety I would suggest they see a gp tbh. However if it just annoyed/frustrated them then its probably just a personality thing, some people just like to have things a certain way, that's just who they are! Its when these things start to take over that it becomes an issue. As I said above if it is causing distress then they need to speak to someone to work out why. I'm not sure the 'deliberately exaggerating for humour' stands either, what's humorous about it? I often wonder this when people say 'my spouse/parent/sibling is so ocd about x' and laugh, if you think something is causing a loved one distress why would that be funny? 
gandalf456 well, I wouldn't! For me its fairly clear cut, well, as something like this can ever be. Basically as I have already said above.
I'm not diagnosing on the internet or belittling peoples experiences of dealing with it, but for me it is something that winds me up when I hear it 9/10 I suspect the person saying it has zero experience or understanding. If someone is suffering from anxiety or OCD or suspects they might be then they need to access help, and misconceptions can prevent that happening. Even amongst the medical professions, I'm due my first baby very shortly, and trying to work with my consultants and midwife regarding my mh has been an uphill battle.
Anyway, that's long, sorry. I'm also not sure it makes sense, sleep has been lacking recently, what with a giant baby in my belly and all. I just wanted to add this www.ocduk.org/types-ocd if that's OK? There's some good info on there, its not exhaustive but there's quite a lot of detail. Always see your Dr if you have concerns though.