Cat Driver here!
I also bought the F-5 due to the low price and I was impressed. While I love the Mig-21 I ended up loving the Tiger more.
While only having to AIM-9s for air to air and guns of course I found myself dropping GBUs and doing Rocket runs. I think the A2G Capabilities exceed the MiG's but both planes have their charm.
The startup is fun however having ground compressed air, rather than internal APU, but it works.