I'm working closely with two students right now. One just graduated with her B.A., the other is a grad student finished with coursework and almost ABD.
One shows up to meetings a few minutes early. The other (the graduate student) shows up 10 minutes late. I can't believe anyone would make an appointment with someone to talk about their own work, and then be late.
One follows through on everything she says she will do, taking care not to promise more than she can realistically handle. The other has done less than half of what she said she'd do this summer--and this after a near-disastrous fieldwork stint last summer when only a fraction of her promised work was completed. Might I add that her fieldwork was funded by my own internal grant--$4k down the drain.
I've committed to being the grad student's adviser. But her faults are so obvious when compared to this incredibly mature (and smart) recent BA who has been sooooo easy to work with.