I started out with traditional grip - my first drum set teacher was a serious Buddy Rich and Joe Morello devotee - but in college I got serious about matched grip. I'm finding that, even though I haven't made a conscious effort to do so, I've slowly been phasing traditional grip out of my repertoire. Even for straight ahead jazz - sometimes, I'll start out holding trad' in the left hand, just out of habit, but within a few measures I'm back to matched. I'm even working on using matched for brushwork.
Bottom line, tho, is do whatever works for you. I haven't yet heard what I consider to be a good argument as to why one would have to use traditional grip, but I also haven't heard any convincing arguments as to why one shouldn't. Knock yourself out.
