I also tend to make pronouncements on things that I haven't fully thought through, and I guess you could call me opinionated. This can get me into lots of trouble with email. My first choice for talking to people is face to face, in person, in the flesh. Next come long rambling paper epistles where I am free to roam all over a subject and take my time expressing what I really mean. Phone calls are not very satisfying for me at all, usually being constrained by time, and the inability to see the person, even though we are connecting kind of in person.
Email becomes a tricky mix of phone call and letter.
You can get the feeling, that you're talking to someone, especially if your email buddies usually respond rather promptly to your messages. Kidding around, sarcasm, and imprecise wording sometimes lead to major misunderstandings. Nuance does not exist in email. You can't see confusion, bewilderment, or hurt. Your witticisms may be taken for barbs.