Pedal decision factors I’ve been thinking of getting new pedals as mine are worse for wear.  What are the best factors to consider when choosing pedals?

I’m on an electric cargo bike and ride fairly fast and aggressively.

I’m not interested in pedals with clips..
My personal preference goes out to MTB Flat-pedals because they offer good grip and a large platform for the foot (which is more comfortable for the foot in my experience). Make sure to get them with metal (replaceable if possible) pins if possible, some cheaper models have plastic 'pins' which are part of the pedal's plastic body (so they are non replaceable) and they wear really fast compared to their metal counterparts. 

This is what they look like (mtb flat pedals):



When getting metal pins it is best to get the pins which have the screw head (the head used to unscrew the pins from the pedal) on the bottom side of the pins (the side of the pins facing the middle of the pedal) such that the head does not get damaged when scraping the pins against concrete and such, if the head is on the 'wrong' side this is not such a big issue though since the pins can still be removed with pliers in almost all cases. If you want cheap replacement pins you could consider getting some threaded rod in the correct size and cutting it to length/using it as pedal pins but it's probably not worth the effort since the pins are not that expensive to begin with.

I would definitely recommend aluminium body pedals over plastic pedals, the plastic variant tends to break (around the axle in general since it's the weakest there) when you strike the pedal against something (a curb, bollard etc.). Similar to photo below. This is quite an extreme case usually a crack forms along where the axle is located and you can use the pedal for some time after but eventually it will fall off and you'll have only the axle left.



There are versions of flat pedals which only have a bearing on one side but I would strongly recommend getting the 'regular' version which has a bearing on both sides since it will last longer and is stronger and also cheaper in most cases.

Make sure the pedal is 'servicable' as in you can remove the pedal body/bearings from the axle to lubricate/service/replace the bearings. Some cheaper models cannot be disassembled and need to be replaced entirely when the bearings are at the end of their life. 

My personal preference goes out to cartridge style bearings since they require no maintenance, are relatively cheap and easy to replace. But cage/ball bearings are not so bad either, if you have a relatively common ball size (sounds weird :P ) the replacements should be easy to find and cheap.