I use a combination of a very basic AEQ 2.0, which has a small battery which you need to charge every couple of days, and shop bought disposable SKE Crystal Bar ones.
Nicotine salt is the choice liquid for me, as it tends to have a bit of flavour to it
Im going to buy the same type as the AEQ but with a x3 sized battery, because it gets a bit much having to make sure it is completely fully charged if i need to go out
I think there is too much to know about the different coils(that heat the liquid) types, different liquid types to do any sort of in depth advice about them - eg wire coil v flat plate, or nic salt v any other type liquid - where one gives better flavour, the other is a bit too mentholly. and TBH I dont really understand enough about it all.
But choice between disposable type or one you fill yourself is that the disposable type is about £5/day(as you seem to smoke one of that type per day), or the liquid, where a bottle costing a fiver lasts about a week.
Obviously far more economical to use and refill yourself with the liquid bottle
Currently I like the Elf Bar liquid as i initially bought the disposable elf bar vape, so opted for the liquid in the AEQ rechargeable just because it is familiar flavour.
https://www.vpz.co.uk/product/aeq-20-pod-device-kit