I just got my first fg/ss bike last December. It was my first new bike in 10 years
Now that I've ridden it for a while and looked at a lot of other people's bikes, I've sorta got a new build forming in my mind.
If you get a complete bike with a pretty solid frame, you can mix and match components for a while until you settle on stuff that you like. Then in the future if you decide you want a new frame, you'll already have some nice components to put on it.
Looking back I wish I had just bought something used, because I already find myself staring longingly at new framesets..
Ride other people's bikes in the meantime too