I'm the same. I've a 10×8 shed and own 10 bikes, although one lives in the roof over summer and one stays in the garden full-time under a placcy bike cover.
I've an extra-wide door on the short wall (gable end) which makes life a lot easier and is definitely worth considering. There's a workbench at the far end which is high enough to get a bike's bars under. Amongst other features, I've a low long shelf down the LH wall under the windows (and under bar height), and a long high shelf down the RH wall, well above bar height. So, no shelves or workbench foul the bars or pedals meaning I can get more bikes in. Eight is comfortable, though nine is possible.