Seven years and I would have continued for many years longer.
I agree with wwwweb that .TV is probably not for newbies. After many years of owning .tv names I think it is still hard to get a handle on what will be a winner, but there are pointers from those with real experience if your read through the TV threads.
Looking at the list of names people acquire and post here at NP
https://www.namepros.com/threads/your-latest-tv-registration-or-acquisition.823576/
I sometimes see what people have bought and squirm for them - especially if they are new to the business, they are young and want to make a quick buck, or have families.
I will not mention names because as we all know sometimes even the most bizarre names will sell, but a lot of what I see makes me understand the value of a domain apprenticeship and experience - especially in niche areas.
Back in the day, many many years ago, and long before I sold names like Music.tv US.tv Canada.tv and hundreds of others, I seriously saw too much positive in every name. Looking at my first foray in .tv I actually bought names like funnier.tv lefthanded.tv phrasebook.tv quoted.tv wished.tv boils.tv hobs.tv candlestick.tv moths.tv moggie.tv oldshows.tv etc
They were flops and are still freely available right now with good reason.
It didn't take long to work out some valuable lessons, the most important being:
It is far better to bide your time and buy one great name and register it for ten years than to quickly buy ten names for one year and hope one will come good.
If you do have an interest in .tv - great - but please understand that what works for .com doesn't always apply for .tv
Hard graft, good research and smooth success to you all...