Brilliant idea for a thread, Allergic!
Most of the time I use an MVP with a GS-H2 and my own microcoil with cotton.
Other kit (there are 3 vapers in my house so it's not all mine!):
Batteries
Various ego batteries (some twisty things off FastTech included) - I've only had 2 fail in a year (think we have about 10 altogether) - one was the 1100mAh passthrough from Apollo (£25!), I was sucked in by the lifetime guarantee but it's such a faff to claim and then they send you something else that doesn't work, I gave up in the end. The other that failed is this from FT - we might have a go at taking it to bits to see what's wrong. All other batteries we've had, some really cheap, have survived a year and are still going strong. Not too impressed with evod batteries, performance seems to drop off as they run down.
X-Fire - very very pretty variable voltage battery
I got mine from FastTech It has a bit of a sticky button but otherwise works fine.
Vamo V5 - OK but the menus are a pain to get round. I don't trust the voltage reading on mine, it seems a bit hot for the numbers. Watts behaves more as expected.
Chi You 'style' mech mod - another pretty one from FT, works fine since I glued it back together 
The batteries I use in the Vamo and chi you are Panasonic NCR18650PD and efest purple IMR 18350 - all work fine 
Clearos
CE4's and CE5's - utter pants, don't bother.
evod original version - rather leaky.
Kanger Protank V1 - good glass clearo and you can pick these up cheap because they are old now. I didn't like the metal drip tip and you can't change it on this model.
Kanger mini protank V2 - lovely glass clearo, changeable drip tip but lots of bits to wash up.
iClear 16 - good, lots of vapour, cheap.
iClear 30 - leaked and spat everywhere. Non-changeable metal drip tip, yuk.
iClear30S - not bad at all, DS likes these. Removable drip tip. Lots of bits.
GS-H5 - bigger version of the GS-H2 - gurgles from half-way down a tank but I haven't tried with my own coil in so possibly mendable
GS-H5C - different shape base from the GS-H5 - better air flow, doesn't gurgle so much.
GDC - I've only seen these on FT here - Like a GS-H2 only glass. Lovely with your own coil or a naturevape coil in. The coil they came with looked rubbish so I binned it. Standard Kanger coils fit.
Other stuff
Naturevape coil - get one, or the cheaper unicoil from Virtual Vape. Lovely vape and last for ages. I make my own very similar now but wouldn't have had the confidence without seeing one of these 'in the flesh'.
iGo L - This is a rebuildable dripping atomiser. I had a bit of a play with it a few months ago but didn't get very far. Now I'm better at building coils I should give it another shot.