Hehe yes, the Learjet flies almost like a heavy plane, especially when full of fuel.
You feel it on landings for example, the vertical speed gets in the negative quite fast...
In FS9 I used to fly the Learjet a lot, just like the other default planes, even though I had already quite a lot of alternative freeware planes installed. Afterwards, the C182, the Jenny, the Trimotor, the Comet, the Vimy and the Vega jumped instantly from my FS9 hangar to my FSX hangar where they all desserved a place.
The C172, Learjet, Bravo, and Baron where part of default FSX planes, with better graphics than the FS9 versions. The KingAir however, was just converted to FSX-native, not updated, so it doesn't look so good, especially the virtual cockpit, unfortunately. In fact, I never use it, I flew it just once, in one of the included missions.
I must admit, I'm a bit of a terror when it comes to Cockpits...

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I annoy everyone, (and their dogs), by only using the 2D cockpit Panel, which generally contains lots of extra goodies, and really useful things, courtesy of my FS Panel Studio...

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I rarely spend much time outside, admiring the aircraft....

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Paul...G-BPLF...FS 2004 + FS Nav...and a big bag of Chocolate Chip Cookies.. 8-)...!