IMHO, the scheduled stuff (bank runs) is going the way of the dodo (with the exception of the scheduled medical lab stuff, but in my experience those are few and far between) within the next two years or so. This means that you'll be flying whenever there's stuff to be flown. That said, more often than not, the on-demand stuff is also at night.
Some guys make a career out of it. It's extremely unlikely that you'll ever break six figures, but as long as the scheduled stuff lasts, you'll sleep in your own bed, know your schedule, generally get the weekends off, etc. For some people that's worth a lot.
I've loved the QOL of freight, although I don't really have anything to which to compare it (unless you count being a CFI, in which case it's LOADS better). As mentioned above, I'm home every day. I work four days a week for about 7 hours a night. That's sort of a "second step" job, though...the first one was a lot more work. I've been flying 135 for about 2 1/2 years now, and by year three I should have over 4000TT/1000MTPIC and never have made less than 32k/year (more on second year/second job payscale). So by the numbers, it's a pretty sweet deal. There are also the intangibles...being more or less your own boss, "boxes don't bitch", flying through uh "interesting" weather, "buck stops here"...all of the freight cliches can be either positives or negatives depending upon your disposition. I love them.
OTOH, there's always a tradeoff. I sleep while it's light outside. I fly the same route every night. I see the same ten people every working day. If I get off work and want a beer, I have to watch soap operas and see the sun come up. There are no hot flight attendants or party time overnights. It was the right thing for me, but it's not for everyone.
