TBC is my favorite WoW expansion by far but I'm definitely one of those people that now contend flying is one of the worst things ever added o the game.
I get why people like it and enjoy it but, it also really destroys the feel of the world.
I'm now in Shadowmoon Valley, all these big scary fortresses with hundreds of elite guards and barricades and towers.... LOL jk just fly directly over them none of the monsters seem to notice or care.
Land in the middle of their fortress, kill the boss, fly out.
What's the point of building a big outdoor fortress with thousands of elite guards if anybody can just zip in? Flying really does destroy the "feel" of the world. It's just way too safe and way too convenient and way too solitary.
I really think they could have done a better job implementing a much more limited flying system, one that gives you some of the pros without all the cons.