A lot SE have help templates for both user old and new. I don't think Bio has one yet but I haven't gone through every meta thread either to verify this. As for should you use the same canned comment or liven it up, that is entirely up to you. For a time on TeX.SE, I used to use the canned comments but they didn't always address my sentiment. Therefore, I no longer use them on any site. If I am going to comment, I put the onus on me with providing the desired information and being personable at the same time; however, this was an individual decision and may not be what is right for everyone. That is, it is your call on how you want to handle it. If you are so inclined, you can develop your own canned comments tailored to your personality as long as they aren't rude or disrespectful or violate any SE/Bio policies.
If you would like, I can provide the links to Math.SE and TeX.SE canned comments. You can use them as a guide post for your own comments or to start a Bio comment thread here in meta as well.
http://meta.math.stackexchange.com/questions/4925/list-of-comment-templateshttps://math.meta.stackexchange.com/questions/4925/list-of-comment-templates
https://tex.meta.stackexchange.com/questions/430/text-building-blocks
I decided to provide the links anyways in case others may be interested. I started Comment templates to provide to new users or users who need a reminder due to this questions. If you know of any comment templates that would be useful to Bio.SE, please add them to linked thread.
