There's a good list on AMR:
http://amr.abime.net/magazines
That's a cool site! I should go through my stacks to see if I can find some stuff they don't have. I think I still have AmigoTimes 1.1 and 1.10, for example, and some other issues of that mag that they are missing cover photos or stats for.
I never subscribed to any computer magazines, but the magazines I used to frequently pick up were Amiga World and Amazing Computing at first, then Amiga User International for a while after I first started finding it on the racks, then Amiga Format.
In post-Commodore days, one of the best mags was Amiga News (French), IMHO, but I only bought a few issues. All of the imported mags were too expensive to buy on a regular basis.