I have been a blood center collections nurse for 1 1/2 years. It is a lot of fun!
At my center, we are a great team of people. Errors get made which is nautral but the management has a strong education focus rather than an "eat the young" focus. You work with primarily healthy people with great veins (except sometimes the autologous donors may have illnesses and poor veins). We easily place 16g needles all the time. You won't lose your phlebotomy skills! The donors want to be there and they love sharing stories (and usually you have a moment or 2 to listen if you want). You learn a lot of geography (people travel to areas of malaria risk all the time). It is generally low stress and happy.
The down side - it can get monotonous and boring to do the same thing every day unless you hook into the people part. Changes can be frequent as dictated by the FDA, AABB, CDC and other govenring boards. Because of said governance, SOPs must be strictly followed because if they do a spot inspection, your center could get shut down (Good news, the rules are for the safety of the recipient or the donor, so thery are there for a good reason!) Our salaries start at about $10 per hour less than the going rate in the local hospitals but my benefits are great!
In short, I love it... also many centers are looking into automation so this is a good place for informatics folks.
Let me know if you have any more questions.... Also, go donate - it can save up to 3 or more lives. Then you could also question the staff, if you go at the end of the drive, it is usually a bit quieter.....