Please keep in mind that I'm asking those who like the challenge of tight, gnarly singletrack. (Todays HS and GNCC stuff is wide-open 2-trak in comparison.)
Most of the guys I ride with are 35-65 years old and have hung-up their racing numbers.... we put in long, high mileage days (usually 60-100 miles.) Almost all of us have given the 4-strokes a try, and about 1/3 have returned to a 2-stroke.

The 4-stroke die-hards are saying:
-Friendlier, more predictable power delivery.
-Holds a straighter line.
-Better traction.
-Better on uphills
-Like the engine braking.
-Lack of "hit" is less tiring.
-No need for pre-mix (I'm not buying that one, how hard is it?)
-Get with the times, the 2-stroke's a dinosaur.
-I can't see thru the 2-stroke smoke!
-Ring-ding-ding p*sses me off.

The 2-stroke die-hards are saying:
-Like the "hit" when the traction's there.
-Less gyro-affect engine mass makes bike more flickable.
-Easier to change lines.
-Better on downhills.
-Lack of weight is less tiring.
-Prefer the brake-slide-in, roost-out technique.
-No valve related maintainance/cost issues (no complaints with the 4-stroke Yamahas and KTMs on this one.)
-Easier to pick up.
-Huh? Your loud 4-stroke is deafening!
-Quiet those echoing 4-strokes down before we lose our land!

It's a fine line for me, but I'm hopping back over to the smokers after I'm done with this bike.

I like the 2-strokes better for everything except mx. The HS races I run are MUCH tighter than GNCC stuff, and 2-strokes pretty much dominate the field.

How about the fact that when you dump a 2-stroke, usually its a 2 or 3 kick restart. Kill a 4-stroke when its hot.

That's one I make sure I point out to my 4-stroke buds while they kick... they don't seem to think it's funny though.

i just got back from riding at rampart range with 5 bikes i was the only 2 stroke. just imagine how much crap i was getting but i was the one giving them crap when i left them in my dust and smoke. i only crashed once and they didnt even know it cause i didnt have to sit there for 2 hours trying to start it first kick and i was off. 2 stroke all the way

Yeah, the 4 strokes are much less tolerant of imperfect pilot jetting.

Holy monkey!!! 16:1?

I see you're in Kansas City, you ride the Missouri series?

Long live the two stroke. I smoke four bangers on a regular basis. We're the last of a dying breed. As long as they make parts for the two stroke, then that's what I'll ride. But sadly, the era of a legend is coming to an end. You'll be sorely missed smoker. I'm just glad to have been apart and the era.