anallawalla - 3:00 am on Jul 18, 2011 (gmt 0)
Think about it from your potential audience's perspective. I usually don't follow accounts with a non-human name and definitely don't follow those with a salesy name. The relevance of their tweets is the next criterion for me. If self-promotion exceeds the rest, I don't follow. The actual avatar is the last of my considerations. Most brands I follow show their logos, as they have more than one person tweeting on their behalf. Self-employed professionals usually have their own photos, which works for me. In this group, someone using a non-photo avatar tends to irritate me.