Would wikifying most of my answers cause problems?
Technically no; it doesn't directly cause any problem with the functionality of the site. But reputation is a measure of how much the community trusts you, and to that end it's useful to other people as well as yourself. So it is better for the community if you don't intentionally wikify your posts. And it doesn't give you any benefit to do so.
Also, community wiki mode is a signal that edits from others are especially welcome; it's meant for the few posts that are really supposed to be collectively written by multiple people. Normal questions and answers don't fit that qualification.
That being said, if you want to go ahead and wikify your posts, it's not something you would get in trouble for (i.e. we wouldn't suspend someone just for that, unless it causes some sort of serious problem in a way we haven't foreseen). But also bear in mind that we will not go through and reverse wiki mode on a large number of posts if you change your mind later. If you decide to make a post community wiki, it will be stuck that way.