With the streak of a tear, Like morning dew
The thing is, it really depends on the games you're playing. Breath of the Wild is not something I'd play in portable mode for example. My usage has been portable but with games I deem compatible with a small screen, and I'm safe in the knowledge I can just plug it to the TV if I want to.
The Lite looks like a great device, and I think they'll sell boatloads of it, but personally if I had to buy my first Switch now, I'd probably still go for the regular one, or wait for a "Pro" version like Walter said.
Yeah... if they had just included a way to simply cable it to your TV, like an old-ass PSP, I'd probably jump. But that's the rub, they want you to buy a regular Switch in that case, except I'd rather have the solid one piece device, and a cord in the back of my TV when I feel like it, than all the detachable parts, accessories and potential hassles (and I don't appreciate the seemingly artificial barrier from a product standpoint). So, I'll probably be waiting to see if the Pro is really the one to get, or it it makes the regular Switch clearly the middle way for me.
Or I just end up getting whatever Lite + Zelda combo I can in a couple months because I'll probably just be playing it at work anyway.