I've been flying my Cessna 150C for about 6 years now. Mines pretty light at under 1,000lbs dry empty weight. It's a C model, the last model to have the straight tail and no rear window.
Light it'll take off and climb pretty well, getting up near gross (only 1500lbs for this model) is a different matter. Solo with half tanks, I can consistenly be off the ground in under 450ft from a grass strip. But thats running in ground effect for a bit before climbing. Typically I use a bit more runway so I can climb immediately. But with 6.00x6 main tires, if the grass gets long, or things are a bit soft or rough the take-off length goes up fast.
I'm assuming my VSI isn't accurate, since it regularly pegs at 2,000fpm sustained. I've going to check the climb with a stop watch next time I fly.
The cockpit is a bit cramped for guys my size (6' and 215lbs), but at least solo it's not bad. And there's plenty of headroom, even with a helmet. Though my right knee tends to ach a bit after long flights.
Flying: In the air is where I most love my little Buck fifty. The controls are light and responsive. It's just a joy to fling around in the mountains spotting for wildlife, or just cruising down a river at 500ft. Stalls are moderate, theres a definite break, but it's not severe. The flaps are huge and work awsome! 10 degrees makes a noticiable difference in take-off runs. And 40 brings you down like a parachute, add a rudder to the floor slip on top of that and I come down like an elevator! (yes, that's an approved manuver in my 150). And of course, since it's light and low powered it'll land much shorter than it can take off. It does seem to be a bit cleaner than other aircraft I've flow, I have to really be precise on my approch speed or I'll float or flop, even with full flaps. Not really a big deal though since it needs so much more runway for take-off anyway. Cruise is decent, I get an honest 100mph for 5.2 gph at 5,000ft, range is decent also.
I was worried that the 150 would lose value, or lose support once the new LSP's got into production too. But since the larger Cessna's don't seem to have suffered that when the new ones started coming out, I'm not sure now.
As far as Bush mods go, Airglas makes a large nose fork that is STC'ed for most trigear cessna's, including the 150 and 152, that allows up to 8.50's on all three wheels. There's a couple STC's for larger engines, but they limit the useful load to the point that it becomes a solo plane. VG's are reported to impove low speed handling, but no real reduction in stall speeds from what I've seen. I decided some time back that if I need a more bush capable plane, I'll sell the 150 and buy one. Looks like I'd be money ahead that way. And it's such a nice flying little plane now I'd hate to lose that by trying to turn it into something it's not.

That said, most of the places I fly have gravel runways, they're just nice, smooth, long gravel runways.
All in all, I'd say my 150 is an all round good plane. Doesn't do anything spectacular, but it's fun to fly. And heck, isn't that why we fly?
Phil