I cannot seem to build a kit without changing things either. Here's a few of my most recent bashes over winter....

1) Herr Piper Cherokee- converted to Electric, added ailerorns, converted to bolt-on wing, and re-shaped tail to more resemble the Piper Arrow.

2) Midwest TriSquire- Converted to Electric, Increased elevator size, Perm. mounted horiz. stab and filled in underneath, fuse mods to lighten and get rid of old-time galloping ghost accomodations, micro servos, steerable nosewheel, converted to bolt-on wing, added louvered vents for ESC and motor cooling, and removable balsa cowl held in place by magnets.

3) Four Star 40 (currently finishing) Moved cockpit area forward about 3", Raised and sheeted turttledeck, Raised dash and front sheeting, room to install scale inst panel, trimmed canopy, Perm. balsa cowl around Saito 56, Reshaped tail feathers, larger control surfaces, Sullivan tailwheel, dual aileron servos (to mix flapperons), clipped wings one bay and added rounded tips, and added structural doublers where needed.

edit: pics added
Second post on page 2 for final list of mods and pics of 4 star.