topher-
If I were you I would pick an exact AFSC and book that job. You get to list 7 when you go into MEPS but you can explain to your recruiter that you are very interested in doing "x" job or list the 7 electronics jobs that sound best to you. The thing that slightly worried me about going open was that if the particular week that jobs dropped all they had available for you was "job y" you pretty much had to take it and be happy with it. At this point you have a leave date for basic so your recruiter will probably not be too excited to re-do the process for you but once you go to basic you have zero leverage to get the job that you want until it's time to re-train (3 years in) if you want to stay in. My main point here is that say for example there is a worst possible job in electronics, well if that's the only one open the week jobs are being given out at basic then that is what they'll assign you and there is no lee way for the most part.
Of course this is all dependent on what you want out of the air force. If you want the GI Bill and have a chance to be stationed almost anywhere then open would be fine. But I would still suggest looking through all the different AFSC's that are offered and if possible find the CFETP for that afsc and it will give you extremely detailed info about what you'd be doing.
for example here is a CFETP for an electronics job I just picked randomly-
http://static.e-publishing.af.mil/production/1/saf_cio_a6/publication/cfetp3d0x4/cfetp3d0x4.pdfAll you have to know is go to air force pubs and search CFETP and all of them that aren't classified will come up.
also there is a site called
afforums.com that has a lot of good info on some jobs and air force related stuff.
As far as AFSC's to avoid, all of them will have pros and cons so I can't tell you what to avoid. Especially in electronics pretty much all of them will teach you some interesting specialized skills.
[This message has been edited by AggieEP (edited 12/23/2013 5:57p).]