I've bought and traded and sold several mods. Still have a few in rotation, but my all-time favorite is still my Provape. It's durable, uses a 14500 (whatever volt that is) and has two fitted tops, so I can switch out attys without it looking funky. I have arthritis, so weight, ease of use, and functionality make a difference to me. This one excels in all areas. It's not too heavy, the button is easy to reach and press (tho it's not the biggest, it's not the teeniest either), and changing the battery/atty/etc is easy to manage. It also performs wonderfully and I haven't had any problems.
(I also love the small size of the GGSlim and it's nice button.. the button is just in a bad place.. at the end)
But, honestly.. with that said.. I still prefer using an Ego/Riva/Vgo/Tornado 1000mah battery with a drip tip. It puts out just as good a vape (in my opinion.. maybe better) AND it's cheaper AND it's lighter and just as easy to use..
so if I were going to treat myself.. I'd probably choose something that is different than the Ego.. like a VV or something..