I think 2, maybe 3 - outside of a few fiction-supported cases (i.e. G1 seekers, cassettes etc.) I usually try to avoid same characters/molds (i.e. lots of repurposing/renaming in my collection), but Animated made me break my rule with Screamer, Swindle, and Bumblebee. Think I'll flog off my keychain 'bee at some point, get a G2 and rename him Goldbug instead, but Swindle and Starscream just don't work as anything other than who they are.

Other exceptions to the rule include Prime (can't quite bear to part with my beat up ol' G1 Prime but MP is just so awesome so I'll have to pick that one up), omnicon repaints, Cyclonus/Scourge for that Unicronian armada feel (oh how I wish for Animated Cyclonus and Classics Scourge), G1/BW Rampage (though Fangry could work for G1 Rampage), and Universe/Animated Prowl.