My absolute favourite is the Wismec DNA200... it's a three battery mod but it's more comfortable to hold in your hand than a lot of two battery mods. Same shape as the RX200 and RX200S... but if you can afford the extra, the DNA200 chip is worth the extra.
SMOK X Cube II is a really good 2-bat mod... perhaps a touch uncomfortable to hold for lengthy periods depending on the size of your hand - my wife struggles with that one a little bit.
Vaporesso Tarot feels really nice in your hand, but I think it's a bit crummy on the functionality side of things... it works, it just feels clumsy.
Joyetech Cuboid... I don't like it - not saying it's a bad mod... I just don't like it. Not sure why on this one.
Sigelei 90W Plus is a good 26650 single battery mod... much nicer than the Presa.
X Cube Mini is more comfortable to hold than the X Cube II... takes a single 18650.
I kinda like the iStick Pico... but compared to the Joyetech eVic VTC Mini... the Joyetech wins... the buttons on the Pico are quite cumbersome compared to the evic mini.
Just opened a Sigelei 213 and it went straight back in the box... don't like the feel of that thing at all... and for its relatively premium price, it shouldn't feel quite so tacky, IMO.
Loads of others too... but my go to mods are Wismec DNA200, SMOK X Cube II, Joyetech eVic VTC Mini, Vaporesso Target & Sigelei 90W Plus