Individual basing for 28mm figures- where do I start?

[ARKOUDAKI]

All interesting views, which are much appreciated. I have a bit of a spin on the original question, namely which basing system would be best for magnetizing. I am tired of storing my models in foam cases and I am looking to just put them all in some Really Useful plastic boxes magnetized to the bottom. So what are the experiences of those that have gone this route?

[Dags]

I just get mdf bases with holes in (3mm for foot, 5mm for cavalry) from Warbases (other suppliers, obviously, are available) and pop in a magnet.

[clibinarium]

Apologies to all I thought I had replied to this post. Loads of great ideas and a really interesting discussion; thank you all. I think I am going for round bases for foot, and pill-shaped for horse.
But now I am not sure whether to go with magnets or not. The agonies of decisions.