I like terrains with lots of stuff to bomb. The one thing the SF terrains killed for me was the lack of trees, HOWEVER the modders took care of that so I easily live with the terrain. Having said that, I'm not a hardcore terrain freak. I'm about the A2A game, a sim MUST have a good dogfight capability. So far I have yet to find a sim that has got that right like the SF series has. IL-2, LOMAC and all its expansions, WWII Fighters, USAF, IAF, Fighters Anthology 's, Fleet Defender. I can go on, I could blow planes out of the sky with impunity in those sims. Some of those I played online and that provided a better challange. The SF series though, has always given me a run for my money. Rolling dogfights, in an gunless F-4 with crappy missiles, outnumbered 2 to 1 against Mig-17's. Or going totall defensive in a B-57B with a Mig-21 trying to ruin your day, or coming off a target in a B-52G at low level with a Mig-23 on your tail and your tail gunner trying to light him up. HOW DOES IT GET ANY BETTER THAN THAT? It doesnt, it doesnt at all.
There are things under the hood I wish TK would just fix so we could stop bitching about it. (Lord knows we have pointed stuff out enough) but over all I'm happy with what I have because I can make this sim anything I want it. I can almost bet no two users of these series installs are alike. Just my 2 cents.