From my office, where I have a fast connection, I usually click "Reply" to add to a thread, so I can have the smilies available if I want them.

From home, where I have a dial-up connection, I'll often (but not always) use the Quick Reply field. Even though it presents fewer options, I don't mind it. Helps me cover ground faster.

I guess the bottom line for me is that I can live with things the way they are. If I want an improvement, I should get a better connection at home. So whatever you decide on this is fine with me.