It can be.
Everybody loves a finish, but being a fighter who normally finishes fights.. he can prove to people that he can go say, 25 minutes and win dominantly. I think it could be good for your career, it shows that you can do 5 rounds and still win and that you don't only rely on finishing the fight quickly.
Like Jose Aldo said, it's good to go to a decision sometimes so you can showcase all of your skills and prove that you can still win after a 25 minute fight instead of finishing them brutally.
If we're talking about Georges St. Pierre, it would be nice to see a finish, and even though I'm not a big fan of his style, the fact he goes 25 minutes and often just dominates his opponent and makes them look so amateur is pretty amazing.
Honestly, I prefer to see fights that go to a decision instead of a finish. I like long fights, I prefer them to be exciting, back-and-forth, and a good showcase of technique more than a knock out in the first round.
I also really like to watch two high level jiu-jitsu guys roll for 15-25 minutes and show how high level they are, making it a good back-and-forth fight. Joe Lauzon's submission over Varner is one of the most beautiful triangles I have ever seen. The whole scramble and Joe sinking in that triangle during a transition the way he did was really refreshing to watch. It's nice to see somebody pull those kinds of things off at this level of MMA.
Charlie Sheen for mod!!
Sherdog; the place where opinion = fact.
Cain Velasquez will go down as the GOAT.