It really depends what you like when you're drunk, for instance all the lightweights I know are really annoying to drink with as they tend to be really annoying drunks.
For instance, while its good that you don't have to spend much to get drunk, if your already drunk by the time everyones isn't even tipsy, you're just going to piss everyone off, for instance, if you start puking when everyone's still sober, no-one's going to be looking at you to kindly in the morning.
So there are benefits and disadvantages of it really, but I see more disadvantages than advantages.
(one last note, if your already hammered and I'm still struggling to get drunk, dont help yourself to all my spirits just because you're on the floor after two pints. You will be paying for more bottles in the morning -_-