I have been doing customer service work for a major communications company for nearly 5 years now. I worked in this field for two other companies before this, and have to say I love it.
I did find that the kind of headset you wear does make a difference. I wear one that sits again one ear. It does not prevent airflow which my prior headset did, and it made a difference.
Depending on the type of calls you get, you will have different experiences. When dealing with billing, you often get very highly emotionally charged calls You learn to de-escalate people and resolve one issue at a time. You have to especially learn not to take things personally.
I currently work in Technical Support. The type of calls I get here are more time consuming, but it really strikes at my 'servant' heart. I like to 'fix' things, and in my field things are always changing, so I find I never get bored. Though I need to be careful about not witnessing to customers, I find that the Lord has really stretched me and helped me to become a better listener, to hear some things beyond that actual words spoken and to speak volumes without a lot of words.
I have a friend that works from home doing customer service and it has given her the freedom she needed for some personal reasons. I prefer working with others, and being part of a team. I find that teamwork has been invaluable to me.