Use OCD as an adjective, as in saying something like, "I'm so OCD about that"? I personally hate it. I understand people are doing it out of ignorance, but I feel like people doing it just further increases people's ignorance about OCD. I wish more than anything that all my OCD involved was simply having a strong preference for things to be clean or organized, but OCD is far more debilitating than that, and it's because of things like that being said by people that many people in my life treat my OCD like simply strong preferences rather than an actual illness.
Regarding how OCD has affected my life? Well, I've had OCD for literally as long as I can remember, (I likely inherited it from my grandmother), and as a result, life has been hard. Last I checked, OCD is technically classified as an anxiety illness, and boy does it fit there well. I've spent so much of my life avoiding "triggers" and "stressors" that might cause my OCD, and thus me, anxiety, so it's caused me to miss out on many things or it's caused me to spend time being anxious when I should've been able to enjoy myself. My OCD has heavily contributed to me placing very little value on my life. And what's worse, it even affects those around me that I love. My husband readily and willingly abides by all my OCD's "rules", and even though he's more than willing to do it to make me happy and decrease my anxiety, it causes me to feel guilty because I feel like he's missing out on things too and needing to do extra effort because of me. Same goes for my parents, best friends, and cousins with whom I have all lived with at some point. But then when someone in my life treats my OCD simply like strong preferences rather than a mental illness and thus exposes me to my stressors, I become angry at them and build resentment. So yes, OCD not only strongly and negativity affects my life, but it also affects those around me too, whether it be the decisions they make or the emotions I build towards them. And the sad thing is, since I've had OCD my whole life, I don't know how to live without it, even though I despise it.