My IV skills have improved a lot. My timing has improved too about 3 minutes to establish IV access and obtain labs. For me, that's a big improvement. I still have a hard time if someone is difficult. I don't mean the impossible, like the IVDU with no veins. In those cases we get a PICC nurse to do it with ultrasound or EJ or IO. What about the in-between cases, fragile veins with lots of valves. Veins that hide under tendons. Infants where the veins hardly show (I try to go in the hands now but most of the time I have to get someone else)
I want to get really good with my IV skills. I enjoy that part of my job a lot.