I had mostly motocrossers such as Honda and Suzuki as well as enduros such as Yamaha and Can Am and even stumbled across an old Husqvarna I had for awhile (but never rode it).
A friend of mine had a Hercules with a 7 speed gearbox and another friend had an old Penton ISDT with the older Sachs engine.
I am over 60 so like the cushy ride of a mountain bike which has shocks up front with big spring and shock under the seat.
I bought a 59. special at Target and had it for over a year. Their parts are warranited pretty good and they are quick to ship them to you. Have never had a problem getting parts.
The bike co. sells to walmart also but theirs are a tad more expensive. Regular at Target was 79 the last time I looked. They have other types as well as some more expensive ones also.
My original frame broke and they replaced the whole bike me wife rides it and I ride the one I got thinking the old one was shot.
Forgot to mention the one's I ride are Magna brand and the wifes is a Next I think they call it - the same company markets under several names. http://www.dynacraftbike.com/ is their website.
A bike sure beats walking I have to excercise and dislike walking - well like very much
Ride 3-3 1/2 miles a day very early before the traffic gets heavy - still have to dodge the fruit cakes - most at that hour think those two white lines at the intersection are for parking