I do not "do" lists anymore, I just use them as a la carte menus. I have done a little more than half of the below 3500' category. The list of 98 3Ks is published in the ADK Guide to Catskill Trails. An update is scheduled for late 2005. The Catskill HH has never been published to my knowledge. The 2980' Red Hill (2990' in AMCese) is one of the additional two. The name of the other escapes me. I believe RoySwkr may have posted the name in a prior thread which I cannot find currently (probably aged out). It isn't Tremper.
The best views are not always at the summit (just like with the 3500) -- that wide open ledge on Van Wyck is one of the best natural views I have seen. If you include the two peaks below 3K, the view from Red Hill's fire tower is hard to beat. Utsayantha's tower view is also very good, I am glad to hear it is open again. Overlook's tower and cliffs, Ashokan High Point's meadow, and Huntersfield summit loop trail also offer great views. The 3100' Plattekill has some nice views of Echo Lake if you look around for them, but there are brambles.
One of my favorite mountains is Olderbark, not so much for the summit, but for the long ridge to Plateau. Olderbark is an fairly straightforward bushwhack up from the southern end Mink Hollow Trail (beware of stinging nettles). The stream on state land, shown on the NY/NJ map #41 is a reasonable guide to get you by the steep upper slopes. After heading south to Olderbark the ridge walk north through mostly open first growth hardwoods to Plateau is a nice encore. It only gets thick near the spruce/fir summit of Plateau. You can return via the marked trails.
The 3440' Roundtop north of Bearpen is privately owned, but there is a
conservation easement so no permission is required. Beware that there is a firing range just west of the hunter's cabin. This Roundtop is one of the easier bushwhacks.
Also like the Catskill 3500 (Big Indian and Eagle) trails do not always go over a summit. The Dry Brook Ridge and Burnt Knob summits are a short distance off the trail. Richmond is also well off the trail.